Document and Entity Information - USD ($)	12 Months Ended
Dec. 31, 2015	Mar. 10, 2016	Jun. 30, 2015
Document And Entity Information
Entity Registrant Name	RadNet, Inc.
Entity Central Index Key	0000790526
Document Type	10-K/A
Document Period End Date	Dec. 31, 2015
Amendment Flag	true
Amendment Description	We are filing this Form 10-K/A (Amendment No. 1) to our Annual Report on Form 10-K for the fiscal year ended December 31, 2015, originally filed with the U.S. Securities and Exchange Commission on March 15, 2016 (the "Original Filing"), solely for the purpose of including the financial statements of certain unconsolidated joint ventures in accordance with Rule 3-09 of Regulation S-X. Rule 3-09 requires that we file financial statements of unconsolidated joint ventures in which we hold equity interests of 50% or less and account for them under the equity method, to the extent that the unconsolidated joint ventures are individually significant. Such statements are required to be audited only for the years in which such unconsolidated joint ventures met applicable significance tests. Under Rule 3-09 of Regulation S-X, we are permitted to file the financial statements for these unconsolidated joint ventures within 90 days of the end of our fiscal year. We determined that as of and for the year ended December 31, 2014, four of our unconsolidated joint venture interests, including Franklin Imaging Joint Venture, Carroll County Radiology, LLC, MRI at St. Joseph Medical Center, LLC, and Greater Baltimore Diagnostic Imaging Partnership (collectively, the “Group”), were significant unconsolidated joint ventures under Rule 3-09 and the accompanying financial statements for the Group for the year ended December 31, 2014 have been audited accordingly. The Group did not meet the significance test for year 2015; therefore, the Group’s financial statements are required to be included for the year ended December 31, 2015, but are not required to be audited. We are permitted to file combined financial statements for individually significant joint ventures which are in the same line of business. Accordingly, we are filing this Amendment No. 1 to include the combined financial statements of the Group under Item 15 - Exhibits and Financial Statement Schedules, and are amending the list of the financial statements and exhibits being filed herewith. We are also filing an updated Exhibit Index and updated Certificates of our Chief Executive Officer and Chief Financial Officer under Sections 302 and 906 of the Sarbanes Oxley Act of 2002. Except as described above, this Form 10-K/A does not amend or change any other items or disclosures in the Original Filing. The disclosure in this Form 10-K/A has not been updated to reflect events occurring after the Original Filing. Accordingly, this Amendment should be read in conjunction with the Original Filing and our other filings with the SEC subsequent to the Original Filing.
Current Fiscal Year End Date	--12-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 266,105,775
Entity Common Stock, Shares Outstanding		47,193,286
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2015

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