Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joanne C. Gwo, O.D.

Q: What is the NPI number for Joanne Gwo?

The National Provider Identifier (NPI) for Joanne Gwo is 1083900336, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in South San Francisco, CA · enumerated 2011.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1083900336

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Registry record

Entity type Individual (Type 1)

Name Joanne C. Gwo

Credential O.D.

Sex Female

Practice address 1600 El Camino Real, Optometry Department, South San Francisco, CA, 94080

Phone (650) 992-5881

Enumeration date Jun 24, 2011

Last updated in NPPES Aug 24, 2022

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT14201TLG (CA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Joanne Gwo?

The National Provider Identifier (NPI) for Joanne Gwo is 1083900336, a Type 1 (individual) record in the CMS NPPES registry.

Where does Joanne Gwo practice?

The practice location on file with NPPES is in South San Francisco, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-24.