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Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2021
May 14, 2021
Sep. 30, 2020
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --03-31    
Document Period End Date Mar. 31, 2021    
Document Fiscal Year Focus 2021    
Document Transition Report false    
Entity File Number 001-38961    
Entity Registrant Name Change Healthcare Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 82-2152098    
Entity Address, Address Line One 424 Church Street    
Entity Address, Address Line Two Suite 1400    
Entity Address, City or Town Nashville    
Entity Address, State or Province TN    
Entity Address, Postal Zip Code 37219    
City Area Code 615    
Local Phone Number 932-3000    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   310,136,566  
Entity Public Float     $ 3,545,569,096
Amendment Flag false    
Entity Central Index Key 0001756497    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement for the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K. 

   
Common Stock [Member]      
Title of 12(b) Security Common Stock, par value $.001 per share    
Trading Symbol CHNG    
Security Exchange Name NASDAQ    
Tangible Equity Units [Member]      
Title of 12(b) Security 6.00% Tangible Equity Units    
Trading Symbol CHNGU    
Security Exchange Name NASDAQ