Quick answers
- Which hospitals does Ivar L. Frithsen work at?
- Medicare's official clinician data lists Ivar L. Frithsen at 5 hospitals: Androscoggin Valley Hospital, Brattleboro Memorial Hospital, Littleton Regional Healthcare, Mary Hitchcock Memorial Hospital and Northeastern Vermont Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ivar L. Frithsen see patients?
- Medicare's clinician data lists 5 practice locations, including St Johnsbury, VT, Brattleboro, VT and Littleton, NH. Call before your visit to confirm the address.
- What is Ivar L. Frithsen's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Ivar L. Frithsen accept Medicare assignment?
- Yes. Medicare's clinician data says Ivar L. Frithsen 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 Ivar L. Frithsen?
- (802) 748-8141, as listed in official Medicare / NPI Registry data.
- What is Ivar L. Frithsen's NPI number?
- 1891803755. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ivar L. Frithsen works
Medicare's Facility Affiliation Data lists Ivar L. Frithsen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Androscoggin Valley HospitalBerlin, NH · Critical Access Hospital · CCN 301310
- Brattleboro Memorial HospitalBrattleboro, VT · Acute Care Hospital · CCN 470011
- Littleton Regional HealthcareLittleton, NH · Critical Access Hospital · CCN 301302
- Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · CCN 300003
- Northeastern Vermont Regional HospitalSaint Johnsbury, VT · Critical Access Hospital · CCN 471303
Practice locations
Addresses where Ivar L. Frithsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1315 Hospital DrSt Johnsbury, VT 05819 (802) 748‑8141
- 17 Belmont AveBrattleboro, VT 05301 (802) 257‑0341
- 580 Saint Johnsbury RdLittleton, NH 03561 (603) 444‑9000
- 59 Page Hill RdBerlin, NH 03570 (603) 752‑2200
- 600 Saint Johnsbury RdLittleton, NH 03561 (603) 444‑9000
Group practices
Medicare enrollment lists Ivar L. Frithsen as a member of these groups (CMS data updated 2026-10-02).
- Littleton Hospital Association113 clinicians in the group
- Northeastern Vermont Regional Hospital Inc100 clinicians in the group
- Brattleboro Memorial Hospital67 clinicians in the group
- Androscoggin Valley Hospital Inc62 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in St Johnsbury
Clinicians with the same Medicare primary specialty in St Johnsbury, VT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891803755 |
| 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