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

Dr. Gary Leland Williams, OD

Optometrist in Bakersfield, CA · enumerated 2006.

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

National Provider Identifier

1477666717

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Registry record

Entity type Individual (Type 1)

Name Dr. Gary Leland Williams

Credential OD

Sex Male

Practice address Bakersfield, CA, 93309

Phone (661) 325-7791

Fax (661) 325-6724

Enumeration date Aug 17, 2006

Last updated in NPPES May 23, 2013

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 4476T (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
1477666717	Other	CA	NPI

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

Where does Gary Williams practice?

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

What is the NPI number for Gary Williams?

The National Provider Identifier (NPI) for Gary Williams is 1477666717, 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 2013-05-23.