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

Dr. Samuel Himelstein, PH.D.

Clinical Psychologist in Oakland, CA · enumerated 2010.

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

National Provider Identifier

1265749790

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Samuel Himelstein

Credential PH.D.

Sex Male

Practice address Oakland, CA, 94605

Phone (510) 295-8977

Enumeration date Sep 3, 2010

Last updated in NPPES Jul 13, 2019

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

Taxonomy & licenses

103TA0400X Addiction (Substance Use Disorder) Psychologist Behavioral Health & Social Service Providers · License PSY25229 (CA) Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License PSY25229 (CA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY25229 (CA) Primary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers · License PSY25229 (CA) Secondary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Samuel Himelstein's NPI record?

Cross-check NPI 1265749790 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1265749790 active?

Yes, as of the latest NPPES snapshot, NPI 1265749790 is active (record last updated 2019-07-13).

Other providers at this practice address

Browse all →

Elizabeth Sautter Speech-Language Pathologist · Oakland, CA NPI 1497983480 Cw Speech and Language Pathologists, Inc Speech-Language Pathologist · Oakland, CA NPI 1598189623 Jessica Moffett Speech-Language Assistant · Oakland, CA NPI 1093228744 Lauren Graham Speech-Language Assistant · Oakland, CA NPI 1073028551 Sonali Desai Speech-Language Assistant · Oakland, CA NPI 1912495276 Center for Adolescent Studies, Inc. Clinical Psychologist · Oakland, CA NPI 1326527581 Colin Mcinnis Speech-Language Assistant · Oakland, CA NPI 1407418189 Masika Henry Speech-Language Pathologist · Oakland, CA NPI 1588217665

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-13.