Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William L Zahn, PSY.D.

Q: What is the NPI number for William Zahn?

The National Provider Identifier (NPI) for William Zahn is 1922382894, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in Emeryville, CA · enumerated 2011 · practices at Pain and Rehabilitative Consultants Medical Group.

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

National Provider Identifier

1922382894

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Registry record

Entity type Individual (Type 1)

Name Dr. William L Zahn

Credential PSY.D.

Sex Male

Practice address 1335 Stanford Ave, Emeryville, CA, 94608

Phone (909) 227-1399

Enumeration date Oct 10, 2011

Last updated in NPPES Jan 12, 2015

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY24256 (CA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

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 William Zahn?

The National Provider Identifier (NPI) for William Zahn is 1922382894, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Zahn practice?

The practice location on file with NPPES is in Emeryville, 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 2015-01-12.