Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2021	May 24, 2021	Sep. 30, 2020
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Registrant Name	CorVel Corporation
Entity Central Index Key	0000874866
Entity File Number	0-19291
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		17,850,728
Entity Public Float			$ 784,387,000
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	5128 Apache Plume Road
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Fort Worth
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76109
City Area Code	817
Local Phone Number	390-1416
Entity Tax Identification Number	33-0282651
Title of 12(b) Security	Common Stock, Par Value $0.0001 Per Share
Trading Symbol	CRVL
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	true
Document Annual Report	true
Document Transition Report	false
Documents Incorporated by Reference	Information required by Items 10 through 14 of Part III of this Form 10-K, to the extent not set forth herein, is incorporated herein by reference to portions of the registrant’s definitive proxy statement for the registrant’s 2021 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended March 31, 2021.  Except with respect to the information specifically incorporated by reference in this Form 10-K, the registrant’s definitive proxy statement is not deemed to be filed as a part of this Form 10-K.