Quick answers
- Does Dennis L. Peterson accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis L. Peterson accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Dennis L. Peterson's NPI number?
- 1205986460. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Dennis L. Peterson works
Medicare's Facility Affiliation Data lists Dennis L. Peterson at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Providence St Joseph Medical CenterPolson, MT · Critical Access Hospital · Emergency services: listed by Medicare · CCN 271343
- St. Patrick HospitalMissoula, MT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 270014
Practice locations
Addresses where Dennis L. Peterson is enrolled with Medicare (CMS data updated October 2, 2026).
- 35401 Mission DrSaint Ignatius, MT 59865 (406) 745‑3525
- 35401 Mission DrSt Ignatius, MT 59865
- 5 4th Ave EPolson, MT 59860 (406) 745‑3525
Group practices
Medicare enrollment lists Dennis L. Peterson as a member of this group (CMS data updated October 2, 2026).
- Confederated Salish and Kootenai Tribes of the Flathead Reservation23 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Montana
Clinicians with the same Medicare primary specialty in Montana — not a recommendation.
Other clinicians in Confederated Salish and Kootenai Tribes of the Flathead Reservation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Nebraska College Of Medicine |
| Graduation year | 1978 (48 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1205986460 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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