Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Warner, PSY.D.

Q: What is the NPI number for Mark Warner?

The National Provider Identifier (NPI) for Mark Warner is 1801951900, a Type 1 (individual) record in the CMS NPPES registry.

Psychologist in Union City, CA · enumerated 2006 · practices at Kaiser Foundation Health Plan Inc.

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

National Provider Identifier

1801951900

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Warner

Credential PSY.D.

Sex Male

Practice address 3555 Whipple Rd, Union City, CA, 94587

Phone (510) 675-3080

Fax (510) 675-4648

Enumeration date Dec 27, 2006

Last updated in NPPES Jan 3, 2022

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY17803 (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 Mark Warner?

The National Provider Identifier (NPI) for Mark Warner is 1801951900, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Warner practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-03.