TIMOTHY P. ARMSTRONG MD
NPI 1871641688
Psychiatry & Neurology - Neurology in Bellingham, WA
About Timothy P. Armstrong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY P. ARMSTRONG MD (NPI 1871641688) is an individual neurology provider in Bellingham, Washington, licensed in Washington (MD60913179) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with St Joseph Hospital, and maintains a secondary practice location in San Diego.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Timothy P. Armstrong Md 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 Reassignment
Medicare enrollment records show Timothy Armstrong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bellingham, WA 98225
- Reassigned Medicare billing, Washington enrollment
- 390 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 11
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Joseph Hospital
Acute Care Hospitals · Bellingham, WAPeacehealth United General Medical Center
Critical Access Hospitals · Sedro Woolley, WAPeacehealth Peace Island Medical Center
Critical Access Hospitals · Friday Harbor, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98225 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BELLINGHAM, WA 98225
BELLINGHAM, WA 98225
BELLINGHAM, WA 98225
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 Timothy Armstrong's NPI number?
The NPI number for Timothy Armstrong is 1871641688. It was assigned to this individual provider in the NPPES registry on January 8, 2007.
Where is Timothy Armstrong located?
Timothy Armstrong practices at Peacehealth Medical Group 710 Birchwood, Suite 201, Bellingham, WA 98225. The listed phone number is (360) 788-6870.
What is Timothy Armstrong's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Timothy Armstrong enrolled in Medicare?
Yes. Timothy Armstrong 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 organization bills Medicare for Timothy Armstrong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Armstrong reassigns Medicare benefits to Peacehealth (Bellingham, WA). The 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 Timothy Armstrong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Armstrong accept?
Health plans from Ambetter Health, Moda Health Plan, Inc., Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Timothy Armstrong 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 Timothy Armstrong affiliated with any hospitals?
According to CMS data, Timothy Armstrong is affiliated with St Joseph Hospital, Peacehealth United General Medical Center and Peacehealth Peace Island Medical Center.
When was this NPI record last updated?
The NPPES record for Timothy Armstrong was last updated on July 24, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.
# Timothy P. Armstrong, MD · NPI 1871641688
Neurology physician in Bellingham, Washington. Individual provider, active in the CMS NPPES registry since January 8, 2007.
## Identity
- **NPI:** 1871641688 (Entity type: Individual)
- **Enumerated:** January 8, 2007
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** MD60913179 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** PEACEHEALTH MEDICAL GROUP, 710 BIRCHWOOD, SUITE 201, Bellingham, WA 98225
- **Phone:** (360) 788-6870 · **Fax:** (360) 788-6872
## 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:** Peacehealth (NPI 1356309553, Bellingham, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 1984
## Record status
- **NPPES last updated:** July 24, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1871641688) · Data from the CMS NPPES public registry.