Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William W Martin Phd PC

Clinical Psychologist in San Clemente, CA · enumerated 2007 · authorized official William Martin, Owner.

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

National Provider Identifier

1609990209

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Registry record

Entity type Organization (Type 2)

Legal business name William W Martin Phd PC

Practice address 665 Camino De Los Mares, Suite 104, San Clemente, CA, 92673

Phone (949) 248-7377

Fax (866) 805-2796

Enumeration date Mar 19, 2007

Last updated in NPPES Mar 7, 2018

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY9840 (CA) Primary

Authorized official

Name William Martin

Title Owner

Phone (949) 248-7377

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2018-03-07. Verify at npiregistry.cms.hhs.gov.

Where is William W Martin Phd PC located?

The practice location on file with NPPES is in San Clemente, CA.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-07.