Quick answers
- Does Mark R. Papenfuss accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Papenfuss 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.
- How many Medicare patients does Mark R. Papenfuss see?
- In 2024, CMS data shows 1,964 Original Medicare patients and 8,144 services for Mark R. Papenfuss. This counts Original Medicare only and measures volume, not quality.
- What is Mark R. Papenfuss's NPI number?
- 1326257064. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mark R. Papenfuss, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,964 |
|---|---|
| Services billed to Medicare | 8,144 |
| Different services or procedures | 133 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)4,020 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)1,300 services
- X-ray of chest, 1 view (71045)491 services
- Screening mammography (77067)389 services
- Screening 3d breast mammography (77063)387 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure73%
- High cholesterol71%
- Arthritis49%
- Diabetes28%
- Chronic kidney disease28%
- Ischemic heart disease27%
Hospitals where Mark R. Papenfuss works
Medicare's Facility Affiliation Data lists Mark R. Papenfuss 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.
- Saint Alphonsus Medical Center - NampaNampa, ID · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 130013
- Saint Alphonsus Medical Center OntarioOntario, OR · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 380052
- Saint Alphonsus Regional Medical CenterBoise, ID · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 130007
- St. Alphonsus Medical Center - Baker CityBaker City, OR · Critical Access Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 381315
- Valor HealthEmmett, ID · Critical Access Hospital · Emergency services: listed by Medicare · CCN 131318
Practice locations
Addresses where Mark R. Papenfuss is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1055 N Curtis RdBoise, ID 83706 (208) 367‑2161
- 2929 E Magic View DrMeridian, ID 83642 (208) 954‑8127
- 323 E Riverside Dr, Suite 108Eagle, ID 83616 (208) 954‑8123
- 3325 Pocahontas RdBaker City, OR 97814 (541) 523‑8137
- 351 SW 9th StOntario, OR 97914 (541) 881‑7120
Group practices
Medicare enrollment lists Mark R. Papenfuss as a member of these groups (CMS data updated October 2, 2026).
- Gem State Radiology LLP73 clinicians in the group
- Intermountain Medical Imaging LLC38 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Boise
Clinicians with the same Medicare primary specialty in Boise, ID — not a recommendation.
Other clinicians in Gem State Radiology LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326257064 |
| 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
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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