Quick answers
- Which hospitals does John A. Fenstermaker work at?
- Medicare's official clinician data lists John A. Fenstermaker at 2 hospitals: Minidoka Memorial Hospital and Portneuf Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John A. Fenstermaker see patients?
- Medicare's clinician data lists 4 practice locations, including Rupert, ID and Pocatello, ID. Call before your visit to confirm the address.
- What is John A. Fenstermaker's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does John A. Fenstermaker accept Medicare assignment?
- Yes. Medicare's clinician data says John A. Fenstermaker 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 A. Fenstermaker?
- (208) 244-0997, as listed in official Medicare / NPI Registry data.
- What is John A. Fenstermaker's NPI number?
- 1548581390. 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 A. Fenstermaker works
Medicare's Facility Affiliation Data lists John A. Fenstermaker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Minidoka Memorial HospitalRupert, ID · Critical Access Hospital · CCN 131319
- Portneuf Medical CenterPocatello, ID · Acute Care Hospital · CCN 130028
Practice locations
Addresses where John A. Fenstermaker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1224 8th StRupert, ID 83350
- 2928 Michelle StPocatello, ID 83201 (208) 244‑0997
- 465 Memorial DrPocatello, ID 83201
- 777 Hospital WayPocatello, ID 83201
Group practices
Medicare enrollment lists John A. Fenstermaker as a member of these groups (CMS data updated 2026-10-02).
- Pocatello Health Services LLC175 clinicians in the group
- Health West Inc67 clinicians in the group
- Minidoka Memorial Hospital39 clinicians in the group
- Optimum Health PLLC9 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Rupert
Clinicians with the same Medicare primary specialty in Rupert, ID — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548581390 |
| 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