| Cover - shares | 3 Months Ended | |
| Mar. 31, 2024 | May 07, 2024 | |
| Document Type | 10-Q/A | |
| Amendment Flag | true | |
| Amendment Description | Amendment No. 1 | |
| Document Quarterly Report | true | |
| Document Transition Report | false | |
| Document Period End Date | Mar. 31, 2024 | |
| Document Fiscal Period Focus | Q1 | |
| Document Fiscal Year Focus | 2024 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity File Number | 001-39248 | |
| Entity Registrant Name | The Oncology Institute, Inc. | |
| Entity Central Index Key | 0001799191 | |
| Entity Tax Identification Number | 84-3562323 | |
| Entity Incorporation, State or Country Code | DE | |
| Entity Address, Address Line One | 18000 Studebaker Rd | |
| Entity Address, Address Line Two | Suite 800 | |
| Entity Address, City or Town | Cerritos | |
| Entity Address, State or Province | CA | |
| Entity Address, Postal Zip Code | 90703 | |
| City Area Code | 562 | |
| Local Phone Number | 735-3226 | |
| Entity Current Reporting Status | Yes | |
| Entity Interactive Data Current | Yes | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Small Business | true | |
| Entity Emerging Growth Company | true | |
| Elected Not To Use the Extended Transition Period | false | |
| Entity Shell Company | false | |
| Entity Common Stock, Shares Outstanding | 74,437,924 | |
| Common Stock [Member] | ||
| Title of 12(b) Security | Common Stock, $0.0001 par value per share | |
| Trading Symbol | TOI | |
| Security Exchange Name | NASDAQ | |
| Redeemable Warrants [Member] | ||
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one share of Common stock, each at an exercise price of $11.50 per share | |
| Trading Symbol | TOIIW | |
| Security Exchange Name | NASDAQ |
