Quick answers
- Which hospitals does John R. Armstrong work at?
- Medicare's official clinician data lists John R. Armstrong at 4 hospitals: Cary Medical Center, Houlton Regional Hospital, Northern Light A R Gould Hospital and Northern Maine Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John R. Armstrong see patients?
- Medicare's clinician data lists 3 practice locations, including Caribou, ME. Call before your visit to confirm the address.
- What is John R. Armstrong's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does John R. Armstrong accept Medicare assignment?
- Yes. Medicare's clinician data says John R. Armstrong accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John R. Armstrong?
- (207) 498-6921, as listed in official Medicare / NPI Registry data.
- What is John R. Armstrong's NPI number?
- 1952893406. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John R. Armstrong works
Medicare's Facility Affiliation Data lists John R. Armstrong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cary Medical CenterCaribou, ME · Acute Care Hospital · CCN 200031
- Houlton Regional HospitalHoulton, ME · Critical Access Hospital · CCN 201308
- Northern Light A R Gould HospitalPresque Isle, ME · Acute Care Hospital · CCN 200018
- Northern Maine Medical CenterFort Kent, ME · Critical Access Hospital · CCN 201317
Practice locations
Addresses where John R. Armstrong is enrolled with Medicare (CMS data updated 2026-10-02).
- 163 Van Buren RdCaribou, ME 04736 (207) 498‑6921
- 74 Access HwyCaribou, ME 04736 (207) 498‑2350
- PO Box, Suite 40Caribou, ME 04736
Group practices
Medicare enrollment lists John R. Armstrong as a member of this group (CMS data updated 2026-10-02).
- Pines Health Services56 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Caribou
Clinicians with the same Medicare primary specialty in Caribou, ME — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952893406 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians