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

Robert Douglas Larson, PSYD

Clinical Psychologist in Oakland, CA · enumerated 2010.

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

National Provider Identifier

1023320090

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Registry record

Entity type Individual (Type 1)

Name Robert Douglas Larson

Credential PSYD

Sex Male

Practice address Oakland, CA, 94618

Phone (510) 306-4472

Enumeration date Jul 7, 2010

Last updated in NPPES Jul 16, 2019

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

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 30603 (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 Robert Larson?

The National Provider Identifier (NPI) for Robert Larson is 1023320090, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Larson practice?

The practice location on file with NPPES is in Oakland, 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 2019-07-16.