v3.23.1
Cover - USD ($)
 12 Months Ended
Jan. 31, 2023
Mar. 17, 2023
Jul. 31, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jan. 31, 2023    
Current Fiscal Year End Date --01-31    
Document Transition Report false    
Entity File Number 001-38977    
Entity Registrant Name PHREESIA, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-2275479    
Entity Address, Address Line One 1521 Concord Pike    
Entity Address, Address Line Two Suite 301 PMB 221    
Entity Address, City or Town Wilmington    
Entity Address, State or Province DE    
Entity Address, Postal Zip Code 19803    
City Area Code 888    
Local Phone Number 654-7473    
Title of 12(b) Security Common stock, $0.01 par value per share    
Trading Symbol PHR    
Security Exchange Name NYSE    
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 Public Float     $ 1,157,351,642
Entity Common Stock, Shares Outstanding (in shares)   53,355,050  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s Definitive Proxy Statement relating to its 2023 Annual Meeting of Stockholders to be filed hereafter are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated.
    
Amendment Flag false    
Entity Central Index Key 0001412408    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY