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

Dr. Marc Allan Katz, PSY.D

Clinical Psychologist in Milpitas, CA · enumerated 2007 · practices at South Bay Healthcare, Inc..

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

National Provider Identifier

1578764411

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Registry record

Entity type Individual (Type 1)
Name Dr. Marc Allan Katz
Credential PSY.D
Sex Male
Practice address Milpitas, CA, 95035
Phone (408) 946-7400
Enumeration date May 29, 2007
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY 17922 (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.

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Frequently asked questions

Where does Marc Katz practice?
The practice location on file with NPPES is in Milpitas, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marc Katz?
The National Provider Identifier (NPI) for Marc Katz is 1578764411, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.