Cover Page - shares	3 Months Ended
	Mar. 31, 2022	May 05, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-33307
Entity Registrant Name	RadNet, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3326724
Entity Address, Address Line One	1510 Cotner Avenue
Entity Address, City or Town	Los Angeles,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90025
City Area Code	310
Local Phone Number	478-7808
Title of 12(b) Security	Common Stock
Trading Symbol	RDNT
Security Exchange Name	NASDAQ
Entity Current Reporting Current	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		56,219,473
Entity Central Index Key	0000790526
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2022