Quick answers
- Does William P. Diehl Iv accept Medicare assignment?
- Yes. Medicare's clinician data says William P. Diehl Iv 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 William P. Diehl Iv see?
- In 2024, CMS data shows 98 Original Medicare patients and 476 services for William P. Diehl Iv. This counts Original Medicare only and measures volume, not quality.
- What is William P. Diehl Iv's NPI number?
- 1275038093. 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 William P. Diehl Iv, 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 | 98 |
|---|---|
| Services billed to Medicare | 476 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 81 |
Most frequent services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)55 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)42 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)38 services
- Hospital discharge day management, more than 30 minutes (99239)30 services
- Hospital discharge day management, 30 minutes or less (99238)28 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 cholesterol48%
- Arthritis42%
- Heart failure39%
- Chronic kidney disease38%
- Depression29%
Hospitals where William P. Diehl Iv works
Medicare's Facility Affiliation Data lists William P. Diehl Iv 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.
- Bonner General HospitalSandpoint, ID · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 131328
- Boundary Community HospitalBonners Ferry, ID · Critical Access Hospital · Emergency services: listed by Medicare · CCN 131301
Practice locations
Addresses where William P. Diehl Iv is enrolled with Medicare (CMS data updated October 2, 2026).
- 6640 Kaniksu StBonners Ferry, ID 83805 (208) 267‑3141
Group practices
Medicare enrollment lists William P. Diehl Iv as a member of this group (CMS data updated October 2, 2026).
- Boundary Community Hospital28 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Idaho
Clinicians with the same Medicare primary specialty in Idaho — not a recommendation.
Other clinicians in Boundary Community Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275038093 |
| 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