DR. RUTH MARIE THOMSON D.O.
NPI 1629209689
Psychiatry & Neurology - Neurology in Portland, OR
About Dr. Ruth Marie Thomson D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RUTH MARIE THOMSON D.O. (NPI 1629209689) is an individual neurology provider in Portland, Oregon, licensed in Oregon (DO184355) and active in the NPI registry since August 2009. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital, and maintains a secondary practice location in Saint Paul.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Ruth Marie Thomson D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
14Medicare enrollment records show Ruth Thomson reassigns Medicare billing to 14 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97225
- Reassigned Medicare billing, Oregon enrollment
- 1,501 clinicians in this Medicare group
Oregon City, OR 97045
- Reassigned Medicare billing, Oregon enrollment
- 206 clinicians in this Medicare group
Staples, MN 56479
- Reassigned Medicare billing, Minnesota and Montana enrollments
- Medicare enrollment name: St Josephs Medical Center
- Also billed through NPI 1568415974 (Montana)
- 340 clinicians in this Medicare group
Lamberton, MN 56152
- Reassigned Medicare billing, Minnesota and Wisconsin enrollments
- Also billed through NPI 1790286193 (Wisconsin)
- 3,733 clinicians in this Medicare group
Longville, MN 56655
- Reassigned Medicare billing, Minnesota enrollment
- 224 clinicians in this Medicare group
Glencoe, MN 55336
- Reassigned Medicare billing, Minnesota enrollment
- 95 clinicians in this Medicare group
Arlington, MN 55307
- Reassigned Medicare billing, Minnesota enrollment
- 229 clinicians in this Medicare group
Waconia, MN 55387
- Reassigned Medicare billing, Minnesota enrollment
- 581 clinicians in this Medicare group
Le Sueur, MN 56058
- Reassigned Medicare billing, Minnesota enrollment
- 201 clinicians in this Medicare group
Lonsdale, MN 55046
- Reassigned Medicare billing, Minnesota enrollment
- 249 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital
Acute Care Hospitals · Coon Rapids, MNProvidence St Vincent Medical Center
Acute Care Hospitals · Portland, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97225 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PORTLAND, OR 97225
PORTLAND, OR 97225
PORTLAND, OR 97225
PORTLAND, OR 97225
PORTLAND, OR 97225
PORTLAND, OR 97225
PORTLAND, OR 97225
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ruth Thomson's NPI number?
The NPI number for Ruth Thomson is 1629209689. It was assigned to this individual provider in the NPPES registry on August 7, 2009.
Where is Ruth Thomson located?
Ruth Thomson practices at 9135 SW Barnes Rd Ste 461, Portland, OR 97225. The listed phone number is (503) 216-1150.
What is Ruth Thomson's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Ruth Thomson enrolled in Medicare?
Yes. Ruth Thomson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Ruth Thomson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruth Thomson reassigns Medicare benefits to 14 organizations: Providence Health & Services - Oregon (Portland, OR), Providence Health & Services - Oregon (Oregon City, OR), St Joseph's Medical Center (Staples, MN), Allina Health System (Lamberton, MN), Cuyuna Regional Medical Center (Longville, MN) and 9 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ruth Thomson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ruth Thomson accept?
Health plans from HealthPartners, Providence Health Plan, Sanford Health Plan and Security Health Plan list Ruth Thomson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ruth Thomson affiliated with any hospitals?
According to CMS data, Ruth Thomson is affiliated with Mercy Hospital and Providence St Vincent Medical Center.
When was this NPI record last updated?
The NPPES record for Ruth Thomson was last updated on September 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Ruth Marie Thomson, D.O. · NPI 1629209689
Neurology physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since August 7, 2009.
## Identity
- **NPI:** 1629209689 (Entity type: Individual)
- **Enumerated:** August 7, 2009
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** DO184355 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 9135 SW BARNES RD STE 461, Portland, OR 97225-6643
- **Phone:** (503) 216-1150
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 14 organizations under Medicare reassignment (form CMS-855R): Providence Health & Services - Oregon (NPI 1154427821, Portland, OR); Providence Health & Services - Oregon (NPI 1003368911, Oregon City, OR); St Joseph's Medical Center (NPI 1538916101, Staples, MN); Allina Health System (NPI 1467090159, Lamberton, MN); Cuyuna Regional Medical Center (NPI 1861414518, Longville, MN); and 9 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Des Moines University Of Osteopathic Medicine And Health Sciences, class of 2008
## Record status
- **NPPES last updated:** September 24, 2025
- **Other identifiers:** Medicaid 1629209689 (MN); Medicaid 1629209689 (WI); Medicaid 1629209689 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1629209689) · Data from the CMS NPPES public registry.