Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory R Thomson, PHD
Psychologist in San Jose, CA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1750366902
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Gregory R Thomson
Credential PHD
Sex Male
Practice address 2512 Samaritan Ct, Suite I, San Jose, CA, 95124
Phone (408) 402-9858
Enumeration date Dec 9, 2005
Last updated in NPPES Sep 11, 2025
Taxonomy & licenses
103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 6301011373 (MI) Secondary
103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License PSY14385 (CA) Secondary
103T00000X Psychologist Behavioral Health & Social Service Providers · License 6301011373 (MI) Secondary
103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License PSY14385 (CA) Secondary
103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 6301011373 (MI) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY14385 (CA) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 6301011373 (MI) Secondary
103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License PSY14385 (CA) Secondary
103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License 6301011373 (MI) Secondary
103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License PSY14385 (CA) Secondary
103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 6301011373 (MI) Secondary
103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY14385 (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.
Frequently asked questions
What specialty is Gregory Thomson?
Gregory Thomson is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → David Silverstein Specialist · San Jose, CA NPI 1124065115 Roger Wapner Clinical Psychologist · San Jose, CA NPI 1265479919 David Chang Vascular Surgery Physician · San Jose, CA NPI 1265453724 Ronald A Restifo MD A Prof Corp Rheumatology Physician · San Jose, CA NPI 1821194341 Sheau-Lin Ho Pediatrics Physician · San Jose, CA NPI 1588705362 Cecil Bradley Addiction (Substance Use Disorder) Counselor · San Jose, CA NPI 1881714517 Marlene Decker Marriage & Family Therapist · San Jose, CA NPI 1881802478 David S. Silverstein, M.D., A Professional Corporation Ophthalmology Physician · San Jose, CA NPI 1134312085
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.