Quick answers
- Does Carl R. Dettwiler accept Medicare assignment?
- Yes. Medicare's clinician data says Carl R. Dettwiler 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 Carl R. Dettwiler see?
- In 2024, CMS data shows 636 Original Medicare patients and 1,938 services for Carl R. Dettwiler. This counts Original Medicare only and measures volume, not quality.
- What is Carl R. Dettwiler's NPI number?
- 1285623819. 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 Carl R. Dettwiler, 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 | 636 |
|---|---|
| Services billed to Medicare | 1,938 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)751 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)269 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)223 services
- Insertion of guide wire with dilation of esophagus using a flexible endoscope (43248)167 services
- Biopsy of large bowel using a flexible endoscope (45380)139 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 pressure64%
- High cholesterol58%
- Arthritis39%
- Diabetes24%
- Anxiety18%
- Depression17%
Hospitals where Carl R. Dettwiler works
Medicare's Facility Affiliation Data lists Carl R. Dettwiler 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.
- Clearwater Valley Hospital & ClinicsOrofino, ID · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 131320
- Gritman Medical CenterMoscow, ID · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 131327
- St Joseph Regional Medical CenterLewiston, ID · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 130003
- Syringa General HospitalGrangeville, ID · Critical Access Hospital · Emergency services: listed by Medicare · CCN 131315
- Tri-State Memorial HospitalClarkston, WA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 501332
Practice locations
Addresses where Carl R. Dettwiler is enrolled with Medicare (CMS data updated October 2, 2026).
- 1221 Highland AveClarkston, WA 99403 (509) 758‑5511
- 2517 17th St BLewiston, ID 83501 (208) 743‑4373
Group practices
Medicare enrollment lists Carl R. Dettwiler as a member of this group (CMS data updated October 2, 2026).
- Clearwater Gastroenterology2 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Other clinicians in Clearwater Gastroenterology
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1981 (45 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1285623819 |
| 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