Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Ruth Marie Thomson, D.O.
Neurology Physician in Portland, OR · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629209689
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Ruth Marie Thomson
Credential D.O.
Sex Female
Practice address 9135 Sw Barnes Rd Ste 461, Portland, OR, 97225
Phone (503) 216-1150
Enumeration date Aug 7, 2009
Last updated in NPPES Sep 24, 2025
Taxonomy & licenses
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1629209689 | Medicaid | MN | - |
| 1629209689 | Medicaid | WI | - |
| 1629209689 | Medicaid | MI | - |
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
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.
What specialty is Ruth Thomson?
Ruth Thomson is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → David Wilkinson Neuromuscular Medicine (Psychiatry & Neurology) Physician · Portland, OR NPI 1609841659 Laurence Ufford Neurology Physician · Portland, OR NPI 1063468171 Herbert Krob Neurology Physician · Portland, OR NPI 1780615625 Felicia Ferguson Neurology Physician · Portland, OR NPI 1972511491 Charles Lavigne Neurology Physician · Portland, OR NPI 1023138799 Biggya Sapkota Neurology Physician · Portland, OR NPI 1306006135 Bruce Geryk Neurocritical Care Physician · Portland, OR NPI 1275794802 Paula Prince Gerontology Nurse Practitioner · Portland, OR NPI 1114165503
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-24.