v3.25.2
Document And Entity Information
Jul. 31, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 31, 2025
Entity Registrant Name Ultragenyx Pharmaceutical Inc.
Entity Central Index Key 0001515673
Entity Emerging Growth Company false
Entity File Number 001-36276
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 27-2546083
Entity Address, Address Line One 60 Leveroni Court
Entity Address, City or Town Novato
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94949
City Area Code 415
Local Phone Number 483-8800
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.001 par value
Trading Symbol RARE
Security Exchange Name NASDAQ