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

Richard S Klein, PH.D

Clinical Psychologist in Arcadia, CA · enumerated 2007.

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

National Provider Identifier

1689865735

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Registry record

Entity type Individual (Type 1)

Name Richard S Klein

Credential PH.D

Sex Male

Practice address Arcadia, CA, 91006

Phone (626) 462-5810

Fax (626) 446-9686

Enumeration date Aug 5, 2007

Last updated in NPPES Aug 5, 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 PSY004152 (CA) Primary

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

Where does Richard Klein practice?

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

What is the NPI number for Richard Klein?

The National Provider Identifier (NPI) for Richard Klein is 1689865735, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Greg Stanford Clinical Psychologist · Arcadia, CA NPI 1558484204

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-05.