| Document and Entity Information | Jul. 20, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | 1Life Healthcare Inc |
| Amendment Flag | false |
| Entity Central Index Key | 0001404123 |
| Document Type | 8-K |
| Document Period End Date | Jul. 20, 2022 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39203 |
| Entity Tax Identification Number | 76-0707204 |
| Entity Address, Address Line One | One Embarcadero Center |
| Entity Address, Address Line Two | Suite 1900 |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94111 |
| City Area Code | (415) |
| Local Phone Number | 814-0927 |
| Written Communications | false |
| Soliciting Material | true |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value |
| Trading Symbol | ONEM |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
