Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sylvia Zhang
Specialist in San Francisco, CA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598034423
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Registry record
Entity type Individual (Type 1)
Name Sylvia Zhang
Sex Female
Practice address 1650 Mission St Fl 5, San Francisco, CA, 94103
Phone (415) 355-3646
Enumeration date Dec 21, 2011
Last updated in NPPES Dec 21, 2011
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 Sylvia Zhang 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 Sylvia Zhang?
The National Provider Identifier (NPI) for Sylvia Zhang is 1598034423, 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 2011-12-21.