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

William Fithian, M.D.

Psychiatry Physician in Monterey, CA · enumerated 2006.

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

National Provider Identifier

1316001159

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Registry record

Entity type Individual (Type 1)

Name William Fithian

Credential M.D.

Sex Male

Practice address Monterey, CA, 93940

Phone (831) 624-5311

Fax (831) 625-4948

Enumeration date Dec 19, 2006

Last updated in NPPES Jul 2, 2014

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

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License G29200 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00G29200	Other	CA	BLUE SHIELD
260049049	Other	CA	RAILROAD

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 William Fithian practice?

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

What is the NPI number for William Fithian?

The National Provider Identifier (NPI) for William Fithian is 1316001159, 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 2014-07-02.