Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Linda Marie Callahan, PSY.D.

Psychologist in Pleasant Hill, CA · enumerated 2007.

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

National Provider Identifier

1528118999

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Registry record

Entity type Individual (Type 1)

Name Dr. Linda Marie Callahan

Credential PSY.D.

Sex Female

Practice address 3480 Buskirk Ave Ste 210, Pleasant Hill, CA, 94523

Phone (925) 933-2627

Enumeration date Jan 10, 2007

Last updated in NPPES Sep 18, 2019

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY17636 (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

Where does Linda Callahan practice?

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

What is the NPI number for Linda Callahan?

The National Provider Identifier (NPI) for Linda Callahan is 1528118999, 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 2019-09-18.