Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Peter Karzmark, PHD

Psychologist in Stanford, CA · enumerated 2007.

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

National Provider Identifier

1023145257

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Registry record

Entity type Individual (Type 1)

Name Peter Karzmark

Credential PHD

Sex Male

Practice address 300 Pasteur Dr, Stanford, CA, 94305

Phone (650) 723-4000

Enumeration date Feb 27, 2007

Last updated in NPPES Jun 8, 2016

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY8551 (CA) Primary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License PSY8551 (CA) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Peter Karzmark?

Peter Karzmark is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-08.