Oscar Health (OSCR) 10-Q 11 May 22 2022 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2022	Apr. 30, 2022
Document Information [Line Items]
Document Type	10-Q
Document Period End Date	Mar. 31, 2022
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-40154
Entity Registrant Name	Oscar Health, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-1315570
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001568651
Entity Address, Address Line One	75 Varick Street, 5th Floor
Entity Address, City or Town	New York,
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10013
City Area Code	(646)
Local Phone Number	403-3677
Trading Symbol	OSCR
Title of 12(b) Security	Class A Common Stock, $0.00001 par value per share
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		175,891,348
Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		35,115,807

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 2,068,632	$ 1,103,995
Short-term investments	810,002	587,086
Premiums and accounts receivable	157,298	138,414
Risk adjustment transfer receivable	50,615	40,659
Accrued investment income	2,584	3,782
Reinsurance recoverable	585,688	431,990
Total current assets	3,674,819	2,305,926
Property, equipment, and capitalized software, net	48,607	46,611
Long-term investments	502,149	844,476
Restricted deposits	27,198	28,085
Other assets	97,153	95,957
Net deferred tax asset	595	595
Total assets	4,350,521	3,321,650
Current Liabilities:
Benefits payable	761,329	513,582
Risk adjustment transfer payable	1,166,059	794,398
Premium deficiency reserve	26,041	29,246
Unearned premiums	74,700	75,044
Accounts payable and other liabilities	220,516	234,788
Reinsurance payable	392,235	205,231
Total current liabilities	2,640,880	1,852,289
Long-term debt	297,416	0
Other liabilities	77,058	76,839
Total liabilities	3,015,354	1,929,128
Commitments and contingencies (Note 13)
Stockholders' Equity
Preferred stock, $0.00001 par value; 82,500,000 shares authorized, none issued or outstanding as of March 31, 2022 and December 31, 2021	0	0
Treasury stock (314,600 shares as of March 31, 2022 and December 31, 2021)	(2,923)	(2,923)
Additional paid-in capital	3,422,033	3,393,533
Accumulated deficit	(2,074,864)	(1,999,712)
Accumulated other comprehensive income (loss)	(12,206)	(3,671)
Total Oscar Health, Inc. stockholders' equity	1,332,042	1,387,229
Noncontrolling interests	3,125	5,293
Total stockholders’ equity	1,335,167	1,392,522
Total liabilities and stockholders' equity	$ 4,350,521	$ 3,321,650
Preferred stock, shares authorized	82,500,000	82,500,000
Class A
Stockholders' Equity
Common stock	$ 2	$ 2
Class B
Stockholders' Equity
Common stock	$ 0	$ 0

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
Preferred stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	82,500,000	82,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock (in shares)	314,600	314,600
Class A
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized	825,000,000	825,000,000
Common stock, shares issued	175,808,779	175,212,223
Common stock, shares outstanding	175,808,779	175,212,223
Class B
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized	82,500,000	82,500,000
Common stock, shares issued	35,115,807	35,115,807
Common stock, shares outstanding	35,115,807	35,115,807

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue
Premiums before ceded reinsurance	$ 1,315,064	$ 610,099
Reinsurance premiums ceded	(359,663)	(241,562)
Premiums earned	955,401	368,537
Administrative services revenue	18,493	341
Investment income (loss) and other revenue	(1,129)	510
Total revenue	972,765	369,388
Operating Expenses
Claims incurred, net	734,566	268,048
Other insurance costs	165,402	79,837
General and administrative expenses	74,664	64,572
Federal and state assessments	69,867	30,515
Premium deficiency reserve release	(3,205)	(9,543)
Total operating expenses	1,041,294	433,429
Loss from operations	(68,529)	(64,041)
Interest expense	4,221	3,697
Other expenses	3,053	0
Loss on extinguishment of debt	0	20,178
Loss before income taxes	(75,803)	(87,916)
Income tax provision	1,517	965
Net loss	(77,320)	(88,881)
Less: Net loss attributable to noncontrolling interests	(2,168)	0
Net loss attributable to Oscar Health, Inc.	$ (75,152)	$ (88,881)
Earnings (Loss) per Share
Net loss per share, basic (in dollars per share)	$ (0.36)	$ (1)
Net loss per share, diluted (in dollars per share)	$ (0.36)	$ (1)
Weighted average common shares outstanding, basic	210,547,696	88,865,726
Weighted-average common shares outstanding, diluted	210,547,696	88,865,726

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (77,320)	$ (88,881)
Other comprehensive income (loss), net of tax:
Net unrealized losses on securities available for sale	(8,535)	(275)
Comprehensive loss	(85,855)	(89,156)
Comprehensive income (loss) attributable to noncontrolling interests	(2,168)	0
Comprehensive loss attributable to Oscar Health, Inc.	$ (83,687)	$ (89,156)

Consolidated Statements of Conv

Consolidated Statements of Convertible Preferred Stock and Changes in Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Common StockClass A	Common StockClass B	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2020	400,904,302
Beginning balance at Dec. 31, 2020	$ 1,744,911
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of pre-IPO shares to Class A and Class B common stock (in shares)	(400,904,302)
Conversion of pre-IPO shares to Class A and Class B common stock	$ (1,744,911)
Ending balance (in shares) at Mar. 31, 2021	0
Ending balance at Mar. 31, 2021	$ 0
Beginning balance (in shares) at Dec. 31, 2020		31,409,202	0	0
Beginning balance at Dec. 31, 2020	(1,295,893)	$ 2	$ 0	$ 0	$ (2,923)	$ 133,255	$ (1,427,106)	$ 879
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of pre-IPO shares to Class A and Class B common stock (in shares)		(31,409,202)	130,280,651	35,115,807
Conversion of pre-IPO shares to Class A and Class B common stock	1,744,910	$ (2)	$ 1			1,744,911
Issuance of common stock upon IPO, net of underwriting discount (in shares)			36,391,946
Issuance of common stock upon IPO, net of underwriting discount	1,338,875		$ 1			1,338,874
Issuance of common stock upon exercise of warrants and call options (in shares)			1,115,973
Issuance of common stock upon exercise of warrants and call options	37,071					37,071
Issuance of common stock from equity incentive plans (in shares)			4,272,060
Issuance of common stock from equity incentive plans	29,805					29,805
Stock-based compensation expense	19,115					19,115
Unrealized gains (losses) on investments, net	(275)							(275)
Net loss	(88,881)						(88,881)
Ending balance (in shares) at Mar. 31, 2021		0	172,060,630	35,115,807
Ending balance at Mar. 31, 2021	1,784,727	$ 0	$ 2	$ 0	(2,923)	3,303,031	(1,515,987)	604
Beginning balance (in shares) at Dec. 31, 2021			175,212,223	35,115,807
Beginning balance at Dec. 31, 2021	1,392,522		$ 2	$ 0	(2,923)	3,393,533	(1,999,712)	(3,671)	$ 5,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from equity incentive plans (in shares)			596,556
Issuance of common stock from equity incentive plans	560					560
Stock-based compensation expense	27,690					27,690
Joint venture contribution	250					250
Unrealized gains (losses) on investments, net	(8,535)							(8,535)
Net loss	(77,320)						(75,152)		(2,168)
Ending balance (in shares) at Mar. 31, 2022			175,808,779	35,115,807
Ending balance at Mar. 31, 2022	$ 1,335,167		$ 2	$ 0	$ (2,923)	$ 3,422,033	$ (2,074,864)	$ (12,206)	$ 3,125

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)	Mar. 31, 2021USD ($)
Cash flows from operating activities:
Net loss	$ (77,320)	$ (88,881)
Adjustments to reconcile net loss to net cash used in operating activities:
Deferred taxes	0	8
Net realized gain (loss) on sale of financial instruments	582	(113)
(Gain) loss on fair value of warrant liabilities	0	12,856
Depreciation and amortization expense	3,799	3,403
Amortization of debt issuance costs	129	329
Stock-based compensation expense	27,690	19,115
Investment amortization, net of accretion	1,922	1,074
Debt extinguishment loss	0	20,178
(Increase) / decrease in:
Premiums and accounts receivable	(18,884)	(10,529)
Risk adjustment transfer receivable	(9,956)	(6,608)
Accrued investment income	1,198	417
Reinsurance recoverable	(153,698)	225,397
Other assets	(743)	(6,336)
Increase / (decrease) in:
Benefits payable	247,747	46,152
Unearned premiums	(344)	42
Premium deficiency reserve	(3,205)	(9,542)
Accounts payable and other liabilities	(14,733)	(11,712)
Reinsurance payable	187,004	(83,258)
Risk adjustment transfer payable	371,661	205,699
Net cash provided by operating activities	562,849	317,691
Cash flows from investing activities:
Purchase of investments	(166,769)	(245,694)
Sale of investments	169,374	83,798
Maturity of investments	105,842	134,199
Purchase of property, equipment and capitalized software	(6,247)	(6,583)
Change in restricted deposits	611	0
Net cash provided by (used in) investing activities	102,811	(34,280)
Cash flows from financing activities:
Proceeds from long-term debt	305,000	0
Payments of debt issuance costs	(7,035)	0
Proceeds from joint venture contribution	250	0
Debt prepayment	0	(153,173)
Debt extinguishment costs	0	(12,994)
Proceeds from IPO, net of underwriting discounts	0	1,348,321
Offering costs from IPO	0	(9,447)
Proceeds from exercise of warrants and call options	0	9,191
Proceeds from exercise of stock options	560	29,652
Net cash provided by financing activities	298,775	1,211,550
Increase in cash, cash equivalents and restricted cash equivalents	964,435	1,494,961
Cash, cash equivalents, restricted cash and cash equivalents—beginning of period	1,125,557	843,105
Cash, cash equivalents, restricted cash and cash equivalents—end of period	2,089,992	2,338,066
Cash and cash equivalents	2,068,632	2,321,287
Restricted cash and cash equivalents included in restricted deposits	21,360	16,779
Total cash, cash equivalents and restricted cash and cash equivalents	2,089,992	2,338,066
Supplemental Disclosures:
Interest payments	261	3,553
Non-cash investing and financing activities:
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	0	1,744,914
Net exercise of preferred stock warrants to preferred stock upon initial public offering	0	28,248
Adjustment to fair value of preferred stock warrant liability upon initial public offering	$ 0	$ 13,243

ORGANIZATION

ORGANIZATION	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION Oscar Health, Inc. ("Oscar" or the "Company") is the first health insurance company built around a full stack technology platform and a relentless focus on serving its members. Headquartered in New York City, Oscar offers two complementary products: (1) innovative and consumer-oriented health plans are sold to Individual, Small Group and Medicare Advantage members and (2) via +Oscar, the Company leverages its technology platform to sell services to providers and payers to directly enable their shift to value-based care. The Company operates as one segment to sell insurance to its members directly and through the state-run health care exchanges formed in conjunction with the Patient Protection and Affordable Care Act via its health insurance subsidiaries and to sell services via its +Oscar offering. Individual plans are offered to individuals and families through Health Insurance Marketplaces. Small Group plans are offered to employees of companies with 50 - 100 full-time workers. Medicare Advantage plans are offered to adults who are age 65 and older and eligible for traditional Medicare but who instead select coverage through a private market plan. The Company has also partnered with Cigna through the Cigna + Oscar partnership, which unites Oscar’s highly-differentiated member experience with Cigna’s broad provider networks, to exclusively serve the Small Group employer market. The Company's Class A common stock is traded on the New York Stock Exchange under the symbol "OSCR." Basis of Presentation The accompanying interim condensed consolidated financial statements of the Company are unaudited. These interim unaudited condensed consolidated financial statements have been prepared in accordance with U.S. GAAP, and the applicable rules and regulations of the Securities and Exchange Commission for interim financial information. As such, these financial statements do not include all information and footnotes required by U.S. GAAP for complete financial statements. These condensed consolidated financial statements are unaudited; however, in the opinion of management, they reflect all adjustments consisting only of normal recurring adjustments necessary to state fairly the information presented for the periods presented in conformity with U.S. GAAP applicable to interim periods. The results of operations for the interim periods presented are not necessarily indicative of results for the full year or future periods. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Annual Report on Form 10-K. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Significant estimates inherent in the preparation of the accompanying interim condensed consolidated financial statements include healthcare costs incurred but not yet reported, premium deficiency reserve and risk adjustment. Estimates are based on past experience and other considerations reasonable under the circumstances. Actual results may differ materially from these estimates.

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	3 Months Ended
	Mar. 31, 2022
Accounting Changes and Error Corrections [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS Accounting Pronouncements - Recently Adopted In August 2020, the Financial Accounting Standards Board issued Accounting Standards Update 2020-06, Accounting for Convertible Instruments and Contracts in an Entity's Own Equity ("ASU 2020-06"). The ASU 2020-06 simplified the accounting for convertible debt instruments by reducing the number of accounting models required under current GAAP. It requires convertible debt instruments to be accounted for under one of the following three models: embedded derivative, substantial premium, or no proceeds allocated (traditional debt) models. It eliminates the cash conversion and beneficial conversion feature models and amends the requirements for a conversion option to be classified in equity. The guidance also simplifies the diluted EPS calculations for certain convertible debt instruments. ASU 2020-06 was adopted on January 1, 2022 and did not have an impact on the Company's consolidated financial statements.

REVENUE RECOGNITION

REVENUE RECOGNITION	3 Months Ended
	Mar. 31, 2022
Insurance [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION Premiums earned Premium revenue includes direct policy premiums collected directly from members and from the Centers for Medicare & Medicaid Services ("CMS") as part of the Advanced Premium Tax Credit Program ("APTC") and Medicare Advantage programs, along with assumed premiums from the Company's reinsurance agreements. Premium revenue is adjusted for the estimated impact of the risk adjustment program required by CMS. Total premiums earned includes the effect of reinsurance premiums ceded as part of the Company's reinsurance agreements. Refer to Note 4 - Reinsurance for more information. Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Direct policy premiums $ 1,656,421 $ 820,814 Assumed premiums 24,790 2,411 Direct and Assumed Policy Premiums 1,681,211 823,225 Risk adjustment (366,147) (213,126) Premiums before ceded reinsurance 1,315,064 610,099 Reinsurance premiums ceded (359,663) (241,562) Total premiums earned $ 955,401 $ 368,537 The following table summarizes the amounts of direct policy premiums received directly from CMS as part of APTC and Medicare Advantage for the three months ended March 31, 2022 and 2021: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) APTC $ 1,394,503 $ 552,342 Medicare Advantage 13,052 9,124 Total paid by CMS $ 1,407,555 $ 561,466 Administrative services revenue

REINSURANCE

REINSURANCE	3 Months Ended
	Mar. 31, 2022
Insurance [Abstract]
REINSURANCE	REINSURANCE The Company enters into reinsurance contracts under two different types of arrangements: quota share reinsurance contracts and excess of loss ("XOL") reinsurance contracts. In quota share reinsurance, the reinsurer assumes an agreed percentage of the underlying policies being reinsured and shares all premiums and incurred claims accordingly. In XOL reinsurance, the reinsurer agrees to assume all or a portion of the ceding company’s losses in excess of a specified amount. All premiums and claims ceded under the Company's quota share arrangements are shared proportionally with the reinsurers. As part of the agreements, the Company also receives ceding commissions, which are calculated based on a percentage of ceded premiums, and experience refunds (resulting from actual claims experience being lower than a specified threshold). Reinsurance Contracts Accounted for under Reinsurance Accounting and Deposit Accounting ASC 944: Financial Services - Insurance requires the substance of all reinsurance arrangements to be evaluated to ensure that significant risk is transferred by the ceding entity to the reinsurer. When significant risk is transferred, reinsurance accounting is required. Reinsurance contracts that do not meet the risk transfer requirements necessary to be accounted for under reinsurance accounting are accounted for under the deposit accounting method. The Company currently has quota share reinsurance arrangements with more than one counterparty with multiple state-level treaties. These arrangements are accounted for under both reinsurance accounting and deposit accounting. Under reinsurance accounting, premiums paid to the reinsurer are recorded as ceded premiums (a reduction to premium revenue). Expected reimbursements from the reinsurer for claims incurred are recorded as a reduction to claims incurred and a corresponding reinsurance recoverable asset. Under deposit accounting, a deposit asset or deposit liability is recorded based on the consideration paid or received, irrespective of the experience of the contract. Fees retained by the reinsurer are recognized within other insurance costs on the statement of operations. As a result, premiums earned and claims incurred that would have otherwise been ceded under reinsurance accounting are recorded on a net basis on the consolidated balance sheet as a deposit liability. The tables below present information for the Company's quota share arrangements accounted for under reinsurance accounting. The composition of total reinsurance premiums ceded and reinsurance premiums assumed, which are included as components of total premiums earned in the consolidated statement of operations, is as follows: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Reinsurance premiums ceded, gross $ (367,111) $ (264,787) Experience refunds 7,448 23,225 Reinsurance premiums ceded (359,663) (241,562) Reinsurance premiums assumed 24,790 2,411 Total reinsurance premiums (ceded) and assumed $ (334,873) $ (239,151) The Company records claims expense net of reinsurance recoveries. The following table reconciles the total claims expense to the net claims expense as presented in the consolidated statement of operations: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Direct claims incurred $ 1,010,035 $ 457,219 Ceded reinsurance claims (299,711) (190,948) Assumed reinsurance claims 24,242 1,777 Total claims incurred, net $ 734,566 $ 268,048 The Company records selling, general and administrative expenses net of reinsurance ceding commissions. The following table reconciles total other insurance costs to the amount presented in the consolidated statement of operations: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Other insurance costs, gross $ 203,713 $ 99,143 Reinsurance ceding commissions (38,311) (19,306) Other insurance costs, net $ 165,402 $ 79,837 The Company classifies reinsurance recoverable within current assets on its consolidated balance sheets. The composition of the reinsurance recoverable balance is as follows: March 31, 2022 December 31, 2021 (in thousands) Ceded reinsurance claim recoverables $ 527,457 $ 406,017 Reinsurance ceding commissions 43,878 23,517 Experience refunds on reinsurance agreements 14,353 2,456 Reinsurance recoverable $ 585,688 $ 431,990 Credit Ratings The Company regularly evaluates the financial condition of its reinsurers to minimize exposure to significant losses. A key credit quality indicator for reinsurance is the financial strength ratings issued by the credit rating agencies, which provide an independent opinion of a reinsurer’s ability to meet ongoing obligations to policyholders. The Company's reinsurers have most recently been issued financial strength ratings of AA- (Standard & Poor's) and AA- (Fitch).

BUSINESS ARRANGEMENTS

BUSINESS ARRANGEMENTS	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BUSINESS ARRANGEMENTS	BUSINESS ARRANGEMENTS Holy Cross Health/Memorial Healthcare System Partnership In 2021, the Company partnered with Holy Cross Health, a top-rated health, teaching and research institution, and Memorial Healthcare System, a leading provider in high-quality healthcare services, to form a joint venture arrangement for its co-branded Medicare Advantage plan in Florida. As part of this arrangement, Holy Cross Health and Memorial Healthcare System jointly own a 50% economic interest in one of the Company's consolidated subsidiaries. As a result, the following noncontrolling interest amounts are presented on the Company's financial statements: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Net loss attributable to noncontrolling interests $ (2,168) $ — March 31, 2022 December 31, 2021 (in thousands) Noncontrolling interests $ 3,125 $ 5,293 Variable Interest Entities In the normal course of business, the Company enters into business arrangements with integrated health systems and several medical professional corporations that employ health care providers to deliver telemedical healthcare services to its covered member population in various states. The financial results of these entities are consolidated into the Company's financial statements. The following table presents the collective assets and liabilities of the Company's variable interest entities: March 31, 2022 December 31, 2021 (in thousands) Assets $ 130,946 $ 123,524 Liabilities $ 71,074 $ 70,165

RESTRICTED CASH AND RESTRICTED

RESTRICTED CASH AND RESTRICTED DEPOSITS	3 Months Ended
	Mar. 31, 2022
Cash and Cash Equivalents [Abstract]
RESTRICTED CASH AND RESTRICTED DEPOSITS	RESTRICTED CASH AND RESTRICTED DEPOSITS The Company maintains cash, cash equivalents and investments on deposit or pledged primarily to various state agencies in connection with its insurance licensure. The restricted cash and cash equivalents and restricted investments presented below are included in “restricted deposits” in the accompanying consolidated balance sheets. March 31, 2022 December 31, 2021 (in thousands) Restricted cash and cash equivalents $ 21,360 $ 21,562 Restricted investments 5,838 6,523 Restricted Deposits $ 27,198 $ 28,085

INVESTMENTS

INVESTMENTS	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS	INVESTMENTS The following tables provide summaries of the Company's investments by major security type as of March 31, 2022 and December 31, 2021: March 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) U.S. treasury and agency securities $ 860,983 $ 243 $ (6,796) $ 854,430 Corporate notes 366,231 5 (5,080) 361,156 Municipalities 37,312 — (511) 36,801 Certificate of deposit 37,924 — — 37,924 Commercial paper 21,840 — — 21,840 Total $ 1,324,290 $ 248 $ (12,387) $ 1,312,151 December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) U.S. treasury and agency securities $ 895,865 $ 34 $ (1,837) $ 894,062 Corporate notes 454,416 2 (1,746) 452,672 Municipalities 50,366 10 (140) 50,236 Certificate of deposit 21,370 — — 21,370 Commercial paper 13,222 — — 13,222 Total $ 1,435,239 $ 46 $ (3,723) $ 1,431,562 The following table summarizes those available-for-sale investments that have been in a continuous loss position for less than 12 months at March 31, 2022 and December 31, 2021. March 31, 2022 Number of Securities Fair Value Gross (in thousands) U.S. treasury and agency securities 98 $ 631,329 $ (6,796) Corporate notes 393 357,359 (5,078) Municipalities 102 $ 36,801 (511) Total 593 $ 1,025,489 $ (12,385) December 31, 2021 Number of Securities Fair Value Gross (in thousands) U.S. treasury and agency securities 108 $ 894,060 $ (1,837) Corporate notes 357 452,672 (1,746) Municipalities 108 50,236 (140) Total 573 $ 1,396,968 $ (3,723) The available-for-sale securities that have been in a continuous unrealized loss position for longer than twelve months as of March 31, 2022 and December 31, 2021 are immaterial. The contractual maturities of available-for-sale securities as of March 31, 2022 are as follows: Amortized Cost Fair Value (in thousands) Due in one year or less $ 816,712 $ 810,002 Due after one year through five years 507,578 502,149 Total $ 1,324,290 $ 1,312,151 Actual maturities of these securities could differ from their contractual maturities used in the table above because issuers may have the right to call or prepay obligations, with or without penalties. Net investment income was attributable to the following: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Interest income $ 697 $ 1,345 Investment discount amortization net of premium accretion (1,919) (1,074) Net realized gain (loss) (581) 113 Total $ (1,803) $ 384 The Company monitors available-for-sale debt securities for credit losses and recognizes an allowance for credit losses when factors indicate a decline in the fair value of a security is credit-related. Certain investments may experience a decline in fair value due to changes in market interest rates, changes in general economic conditions, or a deterioration in the credit worthiness of a security's issuer. The Company has assessed the gross unrealized losses during the period and determined an allowance for credit losses is not necessary because the declines in fair value are believed to be due to market fluctuations and not due to credit-related events.

FAIR VALUE

FAIR VALUE	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE Fair value represents the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants. The Company's financial assets and liabilities measured at fair value on a recurring basis are categorized into a three-level fair value hierarchy based on the priority of the inputs used in the fair value valuation technique. The levels of the fair value hierarchy are as follows: • Level 1 : Inputs utilize quoted (unadjusted) prices in active markets for identical assets or liabilities. • Level 2 : Inputs utilize other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. • Level 3 : Inputs utilized that are unobservable but significant to the fair value measurement for the asset or liability. The unobservable inputs are used to measure fair value to the extent that relevant observable inputs are not available. They typically reflect management’s own estimates about the assumptions a market participant would use in pricing the asset or liability. The following tables summarize fair value measurements by level for assets and liabilities measured at fair value on a recurring basis: March 31, 2022 Level 1 Level 2 Level 3 Total (in thousands) Assets Cash equivalents $ 26,219 $ 22,476 $ — $ 48,695 Investments U.S. treasury and agency securities $ 56,448 $ 797,982 $ — $ 854,430 Corporate notes — 361,156 — 361,156 Municipalities — 21,840 — 21,840 Certificates of deposit — 37,924 — 37,924 Commercial paper — 36,801 — 36,801 Restricted investments U.S. treasury securities $ — $ 5,838 $ 5,838 Total Assets $ 82,667 $ 1,284,017 $ — $ 1,366,684 December 31, 2021 Level 1 Level 2 Level 3 Total Assets (in thousands) Cash Equivalents $ 45,265 $ 1,001 $ — $ 46,266 Investments U.S. treasury and agency securities $ — $ 894,062 $ — $ 894,062 Corporate notes — 452,672 — 452,672 Municipalities — 50,236 — 50,236 Certificates of deposit — 21,370 — 21,370 Commercial paper — 13,222 — 13,222 Restricted Investments U.S. treasury securities $ — $ 6,523 $ — $ 6,523 Total Assets $ 45,265 $ 1,439,086 $ — $ 1,484,351

BENEFITS PAYABLE

BENEFITS PAYABLE	3 Months Ended
	Mar. 31, 2022
Insurance [Abstract]
BENEFITS PAYABLE	BENEFITS PAYABLE Reserves for medical claims expenses are estimated using actuarial assumptions and recorded as a benefits payable liability on the consolidated balance sheet. The assumptions for the estimates and for establishing the resulting liability are reviewed, and any adjustments to reserves are reflected in the consolidated statement of operations in the period in which the estimates are updated. The following table provides a rollforward of the Company’s beginning and ending benefits payable and claims adjustment expenses ("CAE") payable balances for the three months ended March 31, 2022 and 2021: As of March 31, 2022 Benefits Payable Unallocated Claims Total (in thousands) Benefits payable, beginning of the period $ 513,582 $ 9,101 $ 522,683 Less: Reinsurance recoverable 159,180 — 159,180 Benefits payable, beginning of the period, net $ 354,402 $ 9,101 $ 363,503 Claims incurred and CAE Current year $ 751,347 $ 42,018 $ 793,365 Prior years (16,781) — (16,781) Total claims incurred and CAE, net $ 734,566 $ 42,018 $ 776,584 Claims paid and CAE Current year $ 426,168 $ 28,517 $ 454,685 Prior years 141,107 9,101 150,208 Total claims and CAE paid, net $ 567,275 $ 37,618 $ 604,893 Benefits and CAE payable, end of period, net $ 521,693 $ 13,501 $ 535,194 Add: Reinsurance recoverable 239,636 — 239,636 Benefits and CAE payable, end of period $ 761,329 $ 13,501 $ 774,830 As of March 31, 2021 Benefits Payable Unallocated Claims Total (in thousands) Benefits payable, beginning of the period $ 311,914 $ 5,509 $ 317,424 Less: Reinsurance recoverable 132,658 — 132,658 Benefits payable, beginning of the period, net $ 179,256 $ 5,509 $ 184,766 Claims incurred and CAE Current year $ 273,203 $ 16,262 $ 289,465 Prior years (5,155) — (5,155) Total claims incurred and CAE, net $ 268,048 $ 16,262 $ 284,310 Claims paid and CAE Current year $ 167,112 $ 9,943 $ 177,055 Prior years 2,219 5,509 7,728 Total claims and CAE paid, net $ 169,331 $ 15,452 $ 184,783 Benefits and CAE payable, end of period, net $ 277,974 $ 6,319 $ 284,293 Add: Reinsurance recoverable 80,092 — 80,092 Benefits and CAE payable, end of period $ 358,066 $ 6,319 $ 364,385 Amounts incurred related to prior periods vary from previously estimated liabilities as more claim information becomes available and claims are ultimately settled. Negative amounts reported for incurred related to prior years result from claims being ultimately settled for amounts less than originally estimated (favorable development).

LONG-TERM DEBT

LONG-TERM DEBT	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT Convertible Senior Notes In February 2022, the Company issued $305.0 million in aggregate principal amount of convertible senior notes due 2031 (the “2031 Notes”) in a private placement. The 2031 Notes bear interest at a rate of 7.25% per annum, payable in cash, semi-annually in arrears on June 30 and December 31 of each year, commencing on June 30, 2022. The 2031 Notes will mature on December 31, 2031, subject to earlier repurchase, redemption or conversion. The 2031 Notes are our senior, unsecured obligations and are (i) equal in right of payment with the Company's existing and future senior, unsecured indebtedness; (ii) senior in right of payment to the Company's existing and future indebtedness that is expressly subordinated to the 2031 Notes; (iii) effectively subordinated to the Company's existing and future secured indebtedness, to the extent of the value of the collateral securing that indebtedness; and (iv) structurally subordinated to all existing and future indebtedness and other liabilities, including trade payables, and (to the extent the Company is not a holder thereof) preferred equity, if any, of our subsidiaries. The 2031 Notes are convertible into the Company's Class A common stock at initial conversion rates of 120.1721 per $1,000 principal amount (equivalent to an initial conversion price of approximately $8.32 per share of Class A common stock), subject to customary adjustments upon the occurrence of certain events. In addition, upon the occurrence of a make-whole fundamental change, as defined in the Indenture governing the 2031 Notes (the "Indenture"), the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its 2031 Notes in connection with such make-whole fundamental change. Upon conversion, the 2031 Notes will be settled, at the Company's election, in shares of Class A common stock, cash, or a combination of cash and shares of Class A common stock, subject to certain exceptions. Upon the occurrence of a fundamental change as defined in the Indenture, holders of the 2031 Notes have the right to require the Company to repurchase all or some of their 2031 Notes for cash, subject to certain conditions. The repurchase price will be equal to the principal amount of the notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the applicable repurchase date. Additionally, the initial purchasers of the 2031 Notes have the right to require the Company to repurchase all of their Notes for cash, on each of June 30, 2027, June 30, 2028, June 30, 2029 and June 30, 2030, subject to certain notice requirements. The Company may not redeem the 2031 Notes prior to December 31, 2026. The Company may redeem all, but not less than all, of the 2031 Notes, at the Company's option, on or after December 31, 2026 and on or before the 35th scheduled trading day immediately preceding the maturity date, for a cash purchase price equal to the redemption price, but only if the last reported sale price per share of Class A common stock exceeds 200% of the conversion price on each of at least 20 trading days (whether or not consecutive) during the 30 consecutive trading days ending on, and including, the trading day immediately before the date on which the Company sends the redemption notice for such redemption. The redemption price will be a cash amount equal to the principal amount of the 2031 Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. The 2031 Notes include customary provisions relating to the occurrence of “Events of Default” (as defined in the Indenture), as well as customary covenants for convertible notes of this type, including restrictions on our ability to refinance the Company's indebtedness and incur additional indebtedness. As of March 31, 2022, the net carrying amount of the 2031 Notes was $297.4 million, with unamortized debt discount and issuance costs of $7.6 million. The Company classified the fair value of the 2031 Notes as a level 3 measurement due to the lack of observable market data over fair value inputs such as our stock price volatility over the term of the 2031 Notes and the Company's cost of debt. The estimated fair value of the 2031 Notes as of March 31, 2022 was $422.6 million. For the three months ended March 31, 2022, the total interest expense was $3.8 million, which consisted of coupon interest expense of $3.7 million and the amortization of debt discount and issuance costs of $0.1 million, indicating an effective interest rate of 7.61% over the term of the 2031 Notes. Revolving Credit Facility On February 21, 2021, the Company entered into a senior secured credit agreement (the “Revolving Credit Facility”), with certain lenders party thereto from time to time (the “Lenders”), and Wells Fargo Bank, National Association, as administrative agent, for a revolving loan credit facility in the aggregate principal amount of $200.0 million. The Revolving Credit Facility is guaranteed by Oscar Management Corporation, a wholly owned subsidiary of the Company, and all of the Company's future direct and indirect subsidiaries (subject to certain permitted exceptions, including exceptions guarantees that would require material governmental consents or in respect of a joint venture) (the "Guarantors"). The Revolving Credit Facility is secured by substantially all of the Company’s and the Guarantors' assets (subject to certain exceptions). Proceeds are to be used solely for general corporate purposes of the Company. The Company is permitted to increase commitments under the Revolving Credit Facility by an aggregate amount not to exceed $50.0 million, subject to certain conditions. The Revolving Credit Facility matures on February 21, 2024. Under the terms of the Revolving Credit Facility, borrowings under the Revolving Credit Facility bear interest at a rate equal to, at the Company's option, either (a) a rate per annum equal to an adjusted London Inter-bank Offered Rate (“LIBOR”), plus an applicable margin of 4.50% (“Adjusted LIBOR”), is calculated based on one-, three- or six-month LIBOR, or such other period as agreed by all relevant Lenders, which is determined by reference to ICE Benchmark Administration Limited, but not less than 1.00%), or (b) a rate per annum equal to the Alternate Base Rate, as defined in the Revolving Credit Facility, plus the applicable margin of 3.50% (the Alternate Base Rate is equal to the highest of (i) the prime rate, (ii) the federal funds effective rate plus 0.50%, and (iii) the Adjusted LIBOR based on a one-month interest period, plus 1.00%). The Revolving Credit Facility also includes a commitment fee of 0.50% for available but undrawn amounts and other administrative fees that are payable quarterly. It also includes LIBOR replacement provisions in the event LIBOR becomes unavailable during the term of this facility. The Revolving Credit Facility is available until February 2024, provided the Company is in compliance with all covenants. Financial covenant requirements include maintaining minimum thresholds related to direct policy premiums and liquidity and a maximum combined ratio. As of March 31, 2022, there were no outstanding borrowings under the Revolving Credit Facility. Long-Term Debt On October 30, 2020, the Company entered into a credit agreement with HPS Investment Partners, LLC (“HPSIP”) whereby HPSIP agreed to provide a $150.0 million first lien term loan (“Term Loan”). The Term Loan had a variable interest rate equal to LIBOR plus 11.75%, per annum, which equated to 12.75% per annum during the period, and a maturity date of October 30, 2024, subject to certain conditions. In March 2021, the Company used proceeds from its recently completed initial public offering (the “IPO”) to repay the outstanding balance of $153.2 million on its Term Loan, which included $3.2 million of paid-in-kind interest. A loss on debt extinguishment of $20.2 million was recognized, which consisted of $13.0 million in prepayment penalties and $7.2 million in unamortized debt discount and debt issuance costs.

EARNINGS (LOSS) PER SHARE

EARNINGS (LOSS) PER SHARE	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
EARNINGS (LOSS) PER SHARE	EARNINGS (LOSS) PER SHARE The following table presents the computation of basic and diluted earnings per share: Three Months Ended March 31, 2022 March 31, 2021 (in thousands, except share and per share data) Numerator : Net loss attributable to Oscar Health, Inc $ (75,152) $ (88,881) Denominator : Weighted average shares of common stock outstanding, basic and diluted 210,547,696 88,865,726 Net loss per share attributable to Oscar Health, Inc., basic and diluted $ (0.36) $ (1.00) In periods when the Company is in a net loss position, potentially dilutive securities are excluded from the computation of diluted earnings per share because their inclusion would have an anti-dilutive effect. Thus, basic net loss per share is the same as diluted net loss per share. The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the computation of diluted net loss per share attributable to Oscar Health, Inc. because including them would have had an anti-dilutive effect: Three Months Ended March 31, 2022 March 31, 2021 Stock options to purchase common stock 32,819,597 37,654,681 Restricted stock units 18,732,730 2,463,857 Performance-based restricted stock units 7,191,364 6,344,779 Shares underlying convertible notes (Note 10) 36,652,491 — Total 95,396,182 46,463,317

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2022
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES The Company’s current and past business practices are subject to review or other investigations by various state insurance and health care regulatory authorities and other state and federal regulatory authorities. These authorities regularly scrutinize the business practices of health insurance companies. These reviews focus on numerous facets of the Company’s business, including claims payment practices, statutory capital requirements, provider contracting, risk adjustment, competitive practices, commission payments, privacy issues, utilization management practices, pharmacy benefits, access to care, and sales practices, among others. Some of these reviews have historically resulted in fines imposed on the Company and some have required changes to certain of the Company’s practices. The Company continues to be subject to these reviews, which could result in additional fines or other sanctions being imposed on the Company or additional changes to certain of its practices. The Company is also currently involved in, and may in the future from time to time become involved in, legal proceedings and other claims in the ordinary course of its business, including class actions and suits brought by the Company’s members, providers, commercial counterparties, employees, and other parties relating to the Company’s business, including management and administration of health benefit plans and other services. Such matters can include various employment claims, disputes regarding reinsurance arrangements and class action lawsuits, or other claims relating to the performance of contractual and non-contractual obligations to providers, members, employer groups, and others, including, but not limited to, the alleged failure to properly pay in-network and out-of-network claims and challenges to the manner in which the Company processes claims, and claims alleging that the Company has engaged in unfair business practices. The Company records liabilities for its estimates of probable costs resulting from these matters where appropriate. Estimates of costs resulting from legal and regulatory matters involving the Company are inherently difficult to predict, particularly where the matters: involve indeterminate claims for monetary damages or may involve fines, penalties or punitive damages; present novel legal theories or represent a shift in regulatory policy; involve a large number of claimants or regulatory bodies; are in the early stages of the proceedings; or could result in a change in business practices. Accordingly, the Company is often unable to estimate the losses or ranges of losses for those matters where there is a reasonable possibility or it is probable that a loss may be incurred, the ultimate settlement of which could be material. Although it is not possible to accurately predict or determine the eventual outcomes of these items, the Company believes that there are no pending legal proceedings that, individually or in the aggregate, would have a material effect on its business, financial condition or operating results.

ORGANIZATION (Policies)

ORGANIZATION (Policies)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying interim condensed consolidated financial statements of the Company are unaudited. These interim unaudited condensed consolidated financial statements have been prepared in accordance with U.S. GAAP, and the applicable rules and regulations of the Securities and Exchange Commission for interim financial information. As such, these financial statements do not include all information and footnotes required by U.S. GAAP for complete financial statements. These condensed consolidated financial statements are unaudited; however, in the opinion of management, they reflect all adjustments consisting only of normal recurring adjustments necessary to state fairly the information presented for the periods presented in conformity with U.S. GAAP applicable to interim periods. The results of operations for the interim periods presented are not necessarily indicative of results for the full year or future periods. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Annual Report on Form 10-K.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Significant estimates inherent in the preparation of the accompanying interim condensed consolidated financial statements include healthcare costs incurred but not yet reported, premium deficiency reserve and risk adjustment. Estimates are based on past experience and other considerations reasonable under the circumstances. Actual results may differ materially from these estimates.
Accounting Pronouncements - Recently Adopted	Accounting Pronouncements - Recently Adopted In August 2020, the Financial Accounting Standards Board issued Accounting Standards Update 2020-06, Accounting for Convertible Instruments and Contracts in an Entity's Own Equity ("ASU 2020-06"). The ASU 2020-06 simplified the accounting for convertible debt instruments by reducing the number of accounting models required under current GAAP. It requires convertible debt instruments to be accounted for under one of the following three models: embedded derivative, substantial premium, or no proceeds allocated (traditional debt) models. It eliminates the cash conversion and beneficial conversion feature models and amends the requirements for a conversion option to be classified in equity. The guidance also simplifies the diluted EPS calculations for certain convertible debt instruments. ASU 2020-06 was adopted on January 1, 2022 and did not have an impact on the Company's consolidated financial statements.

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	3 Months Ended
	Mar. 31, 2022
Insurance [Abstract]
Schedule of premiums earned	Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Direct policy premiums $ 1,656,421 $ 820,814 Assumed premiums 24,790 2,411 Direct and Assumed Policy Premiums 1,681,211 823,225 Risk adjustment (366,147) (213,126) Premiums before ceded reinsurance 1,315,064 610,099 Reinsurance premiums ceded (359,663) (241,562) Total premiums earned $ 955,401 $ 368,537 The following table summarizes the amounts of direct policy premiums received directly from CMS as part of APTC and Medicare Advantage for the three months ended March 31, 2022 and 2021: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) APTC $ 1,394,503 $ 552,342 Medicare Advantage 13,052 9,124 Total paid by CMS $ 1,407,555 $ 561,466 The tables below present information for the Company's quota share arrangements accounted for under reinsurance accounting. The composition of total reinsurance premiums ceded and reinsurance premiums assumed, which are included as components of total premiums earned in the consolidated statement of operations, is as follows: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Reinsurance premiums ceded, gross $ (367,111) $ (264,787) Experience refunds 7,448 23,225 Reinsurance premiums ceded (359,663) (241,562) Reinsurance premiums assumed 24,790 2,411 Total reinsurance premiums (ceded) and assumed $ (334,873) $ (239,151) The Company records claims expense net of reinsurance recoveries. The following table reconciles the total claims expense to the net claims expense as presented in the consolidated statement of operations: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Direct claims incurred $ 1,010,035 $ 457,219 Ceded reinsurance claims (299,711) (190,948) Assumed reinsurance claims 24,242 1,777 Total claims incurred, net $ 734,566 $ 268,048 The Company records selling, general and administrative expenses net of reinsurance ceding commissions. The following table reconciles total other insurance costs to the amount presented in the consolidated statement of operations: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Other insurance costs, gross $ 203,713 $ 99,143 Reinsurance ceding commissions (38,311) (19,306) Other insurance costs, net $ 165,402 $ 79,837 The Company classifies reinsurance recoverable within current assets on its consolidated balance sheets. The composition of the reinsurance recoverable balance is as follows: March 31, 2022 December 31, 2021 (in thousands) Ceded reinsurance claim recoverables $ 527,457 $ 406,017 Reinsurance ceding commissions 43,878 23,517 Experience refunds on reinsurance agreements 14,353 2,456 Reinsurance recoverable $ 585,688 $ 431,990

REINSURANCE (Tables)

REINSURANCE (Tables)	3 Months Ended
	Mar. 31, 2022
Insurance [Abstract]
Schedule of premiums earned	Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Direct policy premiums $ 1,656,421 $ 820,814 Assumed premiums 24,790 2,411 Direct and Assumed Policy Premiums 1,681,211 823,225 Risk adjustment (366,147) (213,126) Premiums before ceded reinsurance 1,315,064 610,099 Reinsurance premiums ceded (359,663) (241,562) Total premiums earned $ 955,401 $ 368,537 The following table summarizes the amounts of direct policy premiums received directly from CMS as part of APTC and Medicare Advantage for the three months ended March 31, 2022 and 2021: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) APTC $ 1,394,503 $ 552,342 Medicare Advantage 13,052 9,124 Total paid by CMS $ 1,407,555 $ 561,466 The tables below present information for the Company's quota share arrangements accounted for under reinsurance accounting. The composition of total reinsurance premiums ceded and reinsurance premiums assumed, which are included as components of total premiums earned in the consolidated statement of operations, is as follows: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Reinsurance premiums ceded, gross $ (367,111) $ (264,787) Experience refunds 7,448 23,225 Reinsurance premiums ceded (359,663) (241,562) Reinsurance premiums assumed 24,790 2,411 Total reinsurance premiums (ceded) and assumed $ (334,873) $ (239,151) The Company records claims expense net of reinsurance recoveries. The following table reconciles the total claims expense to the net claims expense as presented in the consolidated statement of operations: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Direct claims incurred $ 1,010,035 $ 457,219 Ceded reinsurance claims (299,711) (190,948) Assumed reinsurance claims 24,242 1,777 Total claims incurred, net $ 734,566 $ 268,048 The Company records selling, general and administrative expenses net of reinsurance ceding commissions. The following table reconciles total other insurance costs to the amount presented in the consolidated statement of operations: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Other insurance costs, gross $ 203,713 $ 99,143 Reinsurance ceding commissions (38,311) (19,306) Other insurance costs, net $ 165,402 $ 79,837 The Company classifies reinsurance recoverable within current assets on its consolidated balance sheets. The composition of the reinsurance recoverable balance is as follows: March 31, 2022 December 31, 2021 (in thousands) Ceded reinsurance claim recoverables $ 527,457 $ 406,017 Reinsurance ceding commissions 43,878 23,517 Experience refunds on reinsurance agreements 14,353 2,456 Reinsurance recoverable $ 585,688 $ 431,990

BUSINESS ARRANGEMENTS (Tables)

BUSINESS ARRANGEMENTS (Tables)	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of noncontrolling Interest	As a result, the following noncontrolling interest amounts are presented on the Company's financial statements: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Net loss attributable to noncontrolling interests $ (2,168) $ — March 31, 2022 December 31, 2021 (in thousands) Noncontrolling interests $ 3,125 $ 5,293
Schedule of variable interest entities	The following table presents the collective assets and liabilities of the Company's variable interest entities: March 31, 2022 December 31, 2021 (in thousands) Assets $ 130,946 $ 123,524 Liabilities $ 71,074 $ 70,165

RESTRICTED CASH AND RESTRICTE_2

RESTRICTED CASH AND RESTRICTED DEPOSITS (Tables)	3 Months Ended
	Mar. 31, 2022
Cash and Cash Equivalents [Abstract]
Schedule of restricted deposits	The restricted cash and cash equivalents and restricted investments presented below are included in “restricted deposits” in the accompanying consolidated balance sheets. March 31, 2022 December 31, 2021 (in thousands) Restricted cash and cash equivalents $ 21,360 $ 21,562 Restricted investments 5,838 6,523 Restricted Deposits $ 27,198 $ 28,085

INVESTMENTS (Tables)

INVESTMENTS (Tables)	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Summary of investments	The following tables provide summaries of the Company's investments by major security type as of March 31, 2022 and December 31, 2021: March 31, 2022 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) U.S. treasury and agency securities $ 860,983 $ 243 $ (6,796) $ 854,430 Corporate notes 366,231 5 (5,080) 361,156 Municipalities 37,312 — (511) 36,801 Certificate of deposit 37,924 — — 37,924 Commercial paper 21,840 — — 21,840 Total $ 1,324,290 $ 248 $ (12,387) $ 1,312,151 December 31, 2021 Amortized Cost Unrealized Gains Unrealized Losses Fair Value (in thousands) U.S. treasury and agency securities $ 895,865 $ 34 $ (1,837) $ 894,062 Corporate notes 454,416 2 (1,746) 452,672 Municipalities 50,366 10 (140) 50,236 Certificate of deposit 21,370 — — 21,370 Commercial paper 13,222 — — 13,222 Total $ 1,435,239 $ 46 $ (3,723) $ 1,431,562
Summary of investments in a gross unrealized loss position	The following table summarizes those available-for-sale investments that have been in a continuous loss position for less than 12 months at March 31, 2022 and December 31, 2021. March 31, 2022 Number of Securities Fair Value Gross (in thousands) U.S. treasury and agency securities 98 $ 631,329 $ (6,796) Corporate notes 393 357,359 (5,078) Municipalities 102 $ 36,801 (511) Total 593 $ 1,025,489 $ (12,385) December 31, 2021 Number of Securities Fair Value Gross (in thousands) U.S. treasury and agency securities 108 $ 894,060 $ (1,837) Corporate notes 357 452,672 (1,746) Municipalities 108 50,236 (140) Total 573 $ 1,396,968 $ (3,723)
Summary of investment income	Net investment income was attributable to the following: Three Months Ended March 31, 2022 March 31, 2021 (in thousands) Interest income $ 697 $ 1,345 Investment discount amortization net of premium accretion (1,919) (1,074) Net realized gain (loss) (581) 113 Total $ (1,803) $ 384
Summary of contractual maturities of available-for-sale securities	The contractual maturities of available-for-sale securities as of March 31, 2022 are as follows: Amortized Cost Fair Value (in thousands) Due in one year or less $ 816,712 $ 810,002 Due after one year through five years 507,578 502,149 Total $ 1,324,290 $ 1,312,151

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured on recurring basis	The following tables summarize fair value measurements by level for assets and liabilities measured at fair value on a recurring basis: March 31, 2022 Level 1 Level 2 Level 3 Total (in thousands) Assets Cash equivalents $ 26,219 $ 22,476 $ — $ 48,695 Investments U.S. treasury and agency securities $ 56,448 $ 797,982 $ — $ 854,430 Corporate notes — 361,156 — 361,156 Municipalities — 21,840 — 21,840 Certificates of deposit — 37,924 — 37,924 Commercial paper — 36,801 — 36,801 Restricted investments U.S. treasury securities $ — $ 5,838 $ 5,838 Total Assets $ 82,667 $ 1,284,017 $ — $ 1,366,684 December 31, 2021 Level 1 Level 2 Level 3 Total Assets (in thousands) Cash Equivalents $ 45,265 $ 1,001 $ — $ 46,266 Investments U.S. treasury and agency securities $ — $ 894,062 $ — $ 894,062 Corporate notes — 452,672 — 452,672 Municipalities — 50,236 — 50,236 Certificates of deposit — 21,370 — 21,370 Commercial paper — 13,222 — 13,222 Restricted Investments U.S. treasury securities $ — $ 6,523 $ — $ 6,523 Total Assets $ 45,265 $ 1,439,086 $ — $ 1,484,351

BENEFITS PAYABLE (Tables)

BENEFITS PAYABLE (Tables)	3 Months Ended
	Mar. 31, 2022
Insurance [Abstract]
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense	The following table provides a rollforward of the Company’s beginning and ending benefits payable and claims adjustment expenses ("CAE") payable balances for the three months ended March 31, 2022 and 2021: As of March 31, 2022 Benefits Payable Unallocated Claims Total (in thousands) Benefits payable, beginning of the period $ 513,582 $ 9,101 $ 522,683 Less: Reinsurance recoverable 159,180 — 159,180 Benefits payable, beginning of the period, net $ 354,402 $ 9,101 $ 363,503 Claims incurred and CAE Current year $ 751,347 $ 42,018 $ 793,365 Prior years (16,781) — (16,781) Total claims incurred and CAE, net $ 734,566 $ 42,018 $ 776,584 Claims paid and CAE Current year $ 426,168 $ 28,517 $ 454,685 Prior years 141,107 9,101 150,208 Total claims and CAE paid, net $ 567,275 $ 37,618 $ 604,893 Benefits and CAE payable, end of period, net $ 521,693 $ 13,501 $ 535,194 Add: Reinsurance recoverable 239,636 — 239,636 Benefits and CAE payable, end of period $ 761,329 $ 13,501 $ 774,830 As of March 31, 2021 Benefits Payable Unallocated Claims Total (in thousands) Benefits payable, beginning of the period $ 311,914 $ 5,509 $ 317,424 Less: Reinsurance recoverable 132,658 — 132,658 Benefits payable, beginning of the period, net $ 179,256 $ 5,509 $ 184,766 Claims incurred and CAE Current year $ 273,203 $ 16,262 $ 289,465 Prior years (5,155) — (5,155) Total claims incurred and CAE, net $ 268,048 $ 16,262 $ 284,310 Claims paid and CAE Current year $ 167,112 $ 9,943 $ 177,055 Prior years 2,219 5,509 7,728 Total claims and CAE paid, net $ 169,331 $ 15,452 $ 184,783 Benefits and CAE payable, end of period, net $ 277,974 $ 6,319 $ 284,293 Add: Reinsurance recoverable 80,092 — 80,092 Benefits and CAE payable, end of period $ 358,066 $ 6,319 $ 364,385

EARNINGS (LOSS) PER SHARE (Tabl

EARNINGS (LOSS) PER SHARE (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Schedule of basic and diluted earnings per share	The following table presents the computation of basic and diluted earnings per share: Three Months Ended March 31, 2022 March 31, 2021 (in thousands, except share and per share data) Numerator : Net loss attributable to Oscar Health, Inc $ (75,152) $ (88,881) Denominator : Weighted average shares of common stock outstanding, basic and diluted 210,547,696 88,865,726 Net loss per share attributable to Oscar Health, Inc., basic and diluted $ (0.36) $ (1.00)
Schedule of antidilutive securities excluded from computation	The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the computation of diluted net loss per share attributable to Oscar Health, Inc. because including them would have had an anti-dilutive effect: Three Months Ended March 31, 2022 March 31, 2021 Stock options to purchase common stock 32,819,597 37,654,681 Restricted stock units 18,732,730 2,463,857 Performance-based restricted stock units 7,191,364 6,344,779 Shares underlying convertible notes (Note 10) 36,652,491 — Total 95,396,182 46,463,317

ORGANIZATION (Details)

ORGANIZATION (Details)	3 Months Ended
	Mar. 31, 2022segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	1

REVENUE RECOGNITION (Details)

REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Effects of Reinsurance [Line Items]
Direct policy premiums	$ 1,656,421	$ 820,814
Assumed premiums	24,790	2,411
Direct and Assumed Policy Premiums	1,681,211	823,225
Risk adjustment	(366,147)	(213,126)
Premiums before ceded reinsurance	1,315,064	610,099
Reinsurance premiums ceded	(359,663)	(241,562)
Premiums earned	955,401	368,537
Administrative services revenue	18,493	341
CMS
Effects of Reinsurance [Line Items]
Direct policy premiums	1,407,555	561,466
CMS | APTC
Effects of Reinsurance [Line Items]
Direct policy premiums	1,394,503	552,342
CMS | Medicare Advantage
Effects of Reinsurance [Line Items]
Direct policy premiums	$ 13,052	$ 9,124

REINSURANCE (Details)

REINSURANCE (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Premiums Earned, Net [Abstract]
Reinsurance premiums ceded, gross	$ (367,111)	$ (264,787)
Experience refunds	7,448	23,225
Reinsurance premiums ceded	(359,663)	(241,562)
Assumed premiums	24,790	2,411
Total reinsurance premiums (ceded) and assumed	(334,873)	(239,151)
Policyholder Benefits and Claims Incurred, Net [Abstract]
Direct claims incurred	1,010,035	457,219
Ceded reinsurance claims	(299,711)	(190,948)
Assumed reinsurance claims	24,242	1,777
Total claims incurred, net	734,566	268,048
Other Insurance Cost, Net [Abstract]
Other insurance costs, gross	203,713	99,143
Reinsurance ceding commissions	(38,311)	(19,306)
Other insurance costs, net	165,402	$ 79,837
Reinsurance Recoverables, Including Reinsurance Premium Paid [Abstract]
Ceded reinsurance claim recoverables	527,457		$ 406,017
Reinsurance ceding commissions	43,878		23,517
Experience refunds on reinsurance agreements	14,353		2,456
Reinsurance recoverable	$ 585,688		$ 431,990

BUSINESS ARRANGEMENTS - Noncont

BUSINESS ARRANGEMENTS - Noncontrolling interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Variable Interest Entity [Line Items]
Net income attributable to noncontrolling interests	$ (2,168)	$ 0
Noncontrolling interests	$ 3,125		$ 5,293
Oscar Health subsidiary
Variable Interest Entity [Line Items]
NCI ownership by noncontrolling interest	50.00%
Oscar Health subsidiary | Holy Cross Health and Memorial Healthcare System
Variable Interest Entity [Line Items]
NCI ownership by parent	50.00%

BUSINESS ARRANGEMENTS - Variabl

BUSINESS ARRANGEMENTS - Variable interest entities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets	$ 4,350,521	$ 3,321,650
Liabilities	3,015,354	1,929,128
Primary Beneficiary
Variable Interest Entity [Line Items]
Assets	130,946	123,524
Liabilities	$ 71,074	$ 70,165

RESTRICTED CASH AND RESTRICTE_3

RESTRICTED CASH AND RESTRICTED DEPOSITS (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Restricted cash and cash equivalents	$ 21,360	$ 21,562
Restricted investments	5,838	6,523
Restricted Deposits	$ 27,198	$ 28,085

INVESTMENTS - Summary of invest

INVESTMENTS - Summary of investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,324,290	$ 1,435,239
Unrealized Gains	248	46
Unrealized Losses	(12,387)	(3,723)
Fair Value	1,312,151	1,431,562
U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	860,983	895,865
Unrealized Gains	243	34
Unrealized Losses	(6,796)	(1,837)
Fair Value	854,430	894,062
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	366,231	454,416
Unrealized Gains	5	2
Unrealized Losses	(5,080)	(1,746)
Fair Value	361,156	452,672
Municipalities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	37,312	50,366
Unrealized Gains	0	10
Unrealized Losses	(511)	(140)
Fair Value	36,801	50,236
Certificate of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	37,924	21,370
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	37,924	21,370
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,840	13,222
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	$ 21,840	$ 13,222

INVESTMENTS - Summary of inve_2

INVESTMENTS - Summary of investments in a gross unrealized loss position (Details) $ in Thousands	Mar. 31, 2022USD ($)security	Dec. 31, 2021USD ($)security
Debt Securities, Available-for-sale [Line Items]
Number of Securities | security	593	573
Fair Value	$ 1,025,489	$ 1,396,968
Gross Unrealized Losses	$ (12,385)	$ (3,723)
U.S. treasury and agency securities
Debt Securities, Available-for-sale [Line Items]
Number of Securities | security	98	108
Fair Value	$ 631,329	$ 894,060
Gross Unrealized Losses	$ (6,796)	$ (1,837)
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Number of Securities | security	393	357
Fair Value	$ 357,359	$ 452,672
Gross Unrealized Losses	$ (5,078)	$ (1,746)
Municipalities
Debt Securities, Available-for-sale [Line Items]
Number of Securities | security	102	108
Fair Value	$ 36,801	$ 50,236
Gross Unrealized Losses	$ (511)	$ (140)

INVESTMENTS - Summary of contra

INVESTMENTS - Summary of contractual maturities of available-for-sale securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 816,712
Due after one year through five years	507,578
Amortized Cost	1,324,290	$ 1,435,239
Fair Value
Due in one year or less	810,002
Due after one year through five years	502,149
Fair Value	$ 1,312,151	$ 1,431,562

INVESTMENTS - Summary of inve_3

INVESTMENTS - Summary of investment income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Interest income	$ 697	$ 1,345
Investment amortization, net of accretion	(1,919)	(1,074)
Net realized gain (loss)	(581)	113
Total	$ (1,803)	$ 384

FAIR VALUE - Schedule of assets

FAIR VALUE - Schedule of assets and liabilities measured on recurring basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 1,312,151	$ 1,431,562
U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	854,430	894,062
Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	361,156	452,672
Municipalities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	36,801	50,236
Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	37,924	21,370
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	21,840	13,222
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	48,695	46,266
Total Assets	1,366,684	1,484,351
Recurring | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	854,430	894,062
Recurring | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	361,156	452,672
Recurring | Municipalities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	21,840	50,236
Recurring | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	37,924	21,370
Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	36,801	13,222
Recurring | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	5,838	6,523
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	26,219	45,265
Total Assets	82,667	45,265
Level 1 | Recurring | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	56,448	0
Level 1 | Recurring | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 1 | Recurring | Municipalities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 1 | Recurring | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 1 | Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 1 | Recurring | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	0	0
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	22,476	1,001
Total Assets	1,284,017	1,439,086
Level 2 | Recurring | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	797,982	894,062
Level 2 | Recurring | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	361,156	452,672
Level 2 | Recurring | Municipalities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	21,840	50,236
Level 2 | Recurring | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	37,924	21,370
Level 2 | Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	36,801	13,222
Level 2 | Recurring | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments	5,838	6,523
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Total Assets	0	0
Level 3 | Recurring | U.S. treasury and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 3 | Recurring | Corporate notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 3 | Recurring | Municipalities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 3 | Recurring | Certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 3 | Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	0	0
Level 3 | Recurring | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted investments		$ 0

BENEFITS PAYABLE (Details)

BENEFITS PAYABLE (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Benefits payable, beginning of period	$ 513,582	$ 311,914
CAE payable, beginning of the period	9,101	5,509
Benefits and CAE payable, beginning of period	774,830	364,385	$ 522,683	$ 317,424
Less: Reinsurance recoverable	159,180	132,658
Benefits payable, net reinsurance recoverable, beginning of period	354,402	179,256
Benefits and CAE payable, net, beginning of period	363,503	184,766
Benefits Payable
Current year	751,347	273,203
Prior years	(16,781)	(5,155)
Claims incurred	734,566	268,048
Unallocated Claims Adjustment Expense
Current year	42,018	16,262
Prior years	0	0
Claims adjustment expense	42,018	16,262
Total
Current year	793,365	289,465
Prior years	(16,781)	(5,155)
Total claims incurred and CAE, net	776,584	284,310
Benefits Payable
Current year	426,168	167,112
Prior years	141,107	2,219
Claims paid	567,275	169,331
Unallocated Claims Adjustment Expense
Current year	28,517	9,943
Prior years	9,101	5,509
CAE paid	37,618	15,452
Total
Current year	454,685	177,055
Prior years	150,208	7,728
Total claims and CAE paid, net	604,893	184,783
Benefits payable, net reinsurance recoverable, end of period	521,693	277,974
CAE payable, end of the period	13,501	6,319
Benefits and CAE payable, net, end of period	535,194	284,293
Add: Reinsurance recoverable	239,636	80,092
Benefits payable, end of period	761,329	358,066
Benefits and CAE payable, end of period	$ 774,830	$ 364,385

LONG-TERM DEBT (Details)

LONG-TERM DEBT (Details)	Feb. 21, 2021USD ($)	Oct. 30, 2020USD ($)	Feb. 28, 2022USD ($)tradingDay$ / shares	Mar. 31, 2021USD ($)	Mar. 31, 2022USD ($)	Mar. 31, 2021USD ($)
Debt Instrument [Line Items]
Debt repayment					$ 0	$ 153,173,000
Debt extinguishment loss					0	20,178,000
Debt prepayment cost					0	$ 12,994,000
Convertible debt | 7.25% Convertible Senior Notes Due 2031
Debt Instrument [Line Items]
Aggregate principal amount			$ 305,000,000
Stated interest rate			7.25%
Conversion ratio			0.1201721
Conversion price (in dollars per share) | $ / shares			$ 8.32
Threshold percentage of stock price trigger			200.00%
Threshold trading days | tradingDay			20
Threshold consecutive trading days | tradingDay			30
Long-term debt, net					297,400,000
Unamortized debt discount and debt issuance costs					7,600,000
Long-term debt, fair value					422,600,000
Interest expense, debt					3,800,000
Interest expense, debt, excluding amortization					3,700,000
Amortization of debt issuance costs and discounts					$ 100,000
Effective interest rate					7.61%
Line of credit | Revolving credit facility | Revolving Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 200,000,000
Borrowing capacity, increase limit	$ 50,000,000
Commitment fee	0.50%
Line of credit outstanding					$ 0
Line of credit | Revolving credit facility | LIBOR | Revolving Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate	4.50%
Line of credit | Revolving credit facility | Alternative Base Rate | Revolving Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Line of credit | Revolving credit facility | Fed funds effective rate | Revolving Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Line of credit | Revolving credit facility | Adjusted LIBOR | Revolving Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Loan payable | Facility Agreement
Debt Instrument [Line Items]
Aggregate principal amount		$ 150,000,000
Interest rate during period					12.75%
Debt repayment				$ 153,200,000
Paid-in-kind interest				3,200,000
Debt extinguishment loss				20,200,000
Debt prepayment cost				13,000,000
Unamortized debt discount and issuance costs written off				$ 7,200,000
Loan payable | LIBOR | Facility Agreement
Debt Instrument [Line Items]
Basis spread on variable rate		11.75%

EARNINGS (LOSS) PER SHARE - Sch

EARNINGS (LOSS) PER SHARE - Schedule of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss attributable to Oscar Health, Inc	$ (75,152)	$ (88,881)
Denominator:
Weighted average common shares outstanding, basic	210,547,696	88,865,726
Weighted-average common shares outstanding, diluted	210,547,696	88,865,726
Net loss per share attributable to Oscar Health, Inc., basic and diluted
Net loss per share, basic (in dollars per share)	$ (0.36)	$ (1)
Net loss per share, diluted (in dollars per share)	$ (0.36)	$ (1)

EARNINGS (LOSS) PER SHARE - S_2

EARNINGS (LOSS) PER SHARE - Schedule of antidilutive securities excluded from computation (Details) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)	95,396,182	46,463,317
Stock options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)	32,819,597	37,654,681
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)	18,732,730	2,463,857
Performance-based restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)	7,191,364	6,344,779
Shares underlying convertible notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)	36,652,491	0