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