Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2020	May 26, 2020	Sep. 30, 2019
Cover [Abstract]
Entity Registrant Name	NEXTGEN HEALTHCARE, INC.
Trading Symbol	NXGN
Entity Central Index Key	0000708818
Document Type	10-K
Document Period End Date	Mar. 31, 2020
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 849,511,000
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity File Number	001-12537
Entity Tax Identification Number	95-2888568
Entity Address, Address Line One	18111 Von Karman Avenue
Entity Address, Address Line Two	Suite 800
Entity Address, City or Town	Irvine
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92612
City Area Code	(949)
Local Phone Number	255-2600
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, $0.01 Par Value
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	CA
Document Annual Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		66,105,068
Documents Incorporated by Reference	Portions of the registrant's definitive proxy statement related to the 2020 Annual Shareholders' Meeting to be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended March 31, 2020 are incorporated herein by reference in Part III of this Annual Report on Form 10-K where indicated.