NPI Portal NPI Lookup & Verification

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

Dr. William J Hyatt, O.D.

Optometrist in San Jose, CA · enumerated 2006.

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

National Provider Identifier

1366463192

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Registry record

Entity type Individual (Type 1)
Name Dr. William J Hyatt
Credential O.D.
Sex Male
Practice address San Jose, CA, 95123
Phone (408) 227-2020
Enumeration date Jul 21, 2006
Last updated in NPPES Feb 11, 2022

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

Taxonomy & licenses

152WX0102X Occupational Vision Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
156FC0801X Contact Lens Fitter Eye and Vision Services Providers · License OPT09532T (CA) Secondary
156FX1900X Orthoptist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
152W00000X Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Primary
152WC0802X Corneal and Contact Management Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
152WP0200X Pediatric Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
152WS0006X Sports Vision Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
152WV0400X Vision Therapy Optometrist Eye and Vision Services Providers · License OPT09532T (CA) Secondary
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
SD0095321 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.

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Frequently asked questions

What is the NPI number for William Hyatt?
The National Provider Identifier (NPI) for William Hyatt is 1366463192, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Hyatt practice?
The practice location on file with NPPES is in San Jose, 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 2022-02-11.