Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Walter A Wong, OD

Q: What is the NPI number for Walter Wong?

The National Provider Identifier (NPI) for Walter Wong is 1689647414, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in San Mateo, CA · enumerated 2006.

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

National Provider Identifier

1689647414

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Registry record

Entity type Individual (Type 1)

Name Walter A Wong

Credential OD

Sex Male

Practice address San Mateo, CA, 94403

Phone (650) 830-5675

Fax (650) 830-5675

Enumeration date Feb 10, 2006

Last updated in NPPES Mar 7, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 10182T (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
SD0101820	Medicaid	CA	-

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 Walter Wong?

The National Provider Identifier (NPI) for Walter Wong is 1689647414, a Type 1 (individual) record in the CMS NPPES registry.

Where does Walter Wong practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.