Cover - shares	6 Months Ended
	Jun. 30, 2022	Aug. 09, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-39248
Entity Registrant Name	The Oncology Institute, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-3562323
Entity Address, Address Line One	18000 Studebaker Rd, 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	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		72,140,372
Entity Central Index Key	0001799191
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Trading Symbol	TOI
Security Exchange Name	NASDAQ
Warrant
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock
Trading Symbol	TOIIW
Security Exchange Name	NASDAQ