| Cover | Jun. 20, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 20, 2024 |
| 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 | 1800 Studebaker Road |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock, par value $0.0001 | |
| Title of 12(b) Security | Common Stock, par value $0.0001 |
| Trading Symbol | TOI |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants, each whole warrant exercisable for one share of common stock, each at an exercise price of $11.50 per share | |
| 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 |
