Quick answers
- Does William G. Stahl Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William G. Stahl Iii 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 G. Stahl Iii see?
- In 2024, CMS data shows 189 Original Medicare patients and 10,863 services for William G. Stahl Iii. This counts Original Medicare only and measures volume, not quality.
- What is William G. Stahl Iii's NPI number?
- 1265484760. 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 G. Stahl Iii, 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 | 189 |
|---|---|
| Services billed to Medicare | 10,863 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
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)153 services
- Colorectal cancer screening; colonoscopy on individual at high risk (G0105)69 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)56 services
- Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43235)23 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)17 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 cholesterol70%
- High blood pressure67%
- Arthritis37%
- Depression21%
- Anxiety18%
- Diabetes17%
Practice locations
Addresses where William G. Stahl Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 1414 W Fair AveMarquette, MI 49855 (906) 225‑3880
Group practices
Medicare enrollment lists William G. Stahl Iii as a member of this group (CMS data updated October 2, 2026).
- U.P. Digestive Disease Associates. P.C.2 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Marquette
Clinicians with the same Medicare primary specialty in Marquette, MI — not a recommendation.
Other clinicians in U.P. Digestive Disease Associates. P.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers R W Johnson Medical School (cam/new Bruns/pisc) |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265484760 |
| 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
- 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