Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Peien Yu
Social Worker in San Francisco, CA · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639956543
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Registry record
Entity type Individual (Type 1)
Name Peien Yu
Sex Female
Practice address 4150 Clement St Bldg 203, San Francisco, CA, 94121
Phone (415) 221-4810
Enumeration date Sep 13, 2023
Last updated in NPPES Sep 13, 2023
Taxonomy & licenses
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Peien Yu practice?
The practice location on file with NPPES is in San Francisco, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Peien Yu?
The National Provider Identifier (NPI) for Peien Yu is 1639956543, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-13.