Mehmet E. Donat, MD
NPI 1003898347ActiveIndividual· Internal Medicine, Gastroenterology· Troy, MI
Internal Medicine, Gastroenterology (MD) with Troy Gastroenterology PC, practicing in Troy, Michigan. Their prescriptions cost Medicare Part D more than their services did: $884,874 for 1,692 claims, against $148,542 paid for services in 2024. Abbvie Inc. was the largest of 12 companies reporting payments in 2025, $1,081 in all, mostly food and beverage. Lists Beaumont Hospital - Grosse Pointe and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1003898347 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 14, 2005 |
| Last updated in NPPES | Sep 17, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 4301075529 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 571 |
|---|---|
| Services billed | 3,595 across 37 procedure codes |
| Paid by Medicare | $148,542 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,692 · 3,496 30-day fills |
|---|---|
| Patients | 459 |
| Total drug cost | $884,874 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Troy Gastroenterology PCRochester Hills, MI · 49 clinicians
Hospital affiliations
- Beaumont Hospital - Grosse PointeGrosse Pointe, MI
- Beaumont Hospital Royal OakRoyal Oak, MI
- Beaumont Hospital, TroyTroy, MI
Industry payments (Open Payments)
- 2025$1,081 · 53 payments from 12 companies
- 2024$807.20 · 40 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $440.70 | 20 |
| Pfizer Inc. | $155.80 | 7 |
| Takeda Pharmaceuticals U.S.A., Inc. | $79.76 | 4 |
| Ardelyx, Inc. | $79.60 | 5 |
| Genzyme Corporation | $76.58 | 3 |
What the 2025 payments were for
- Food and Beverage$1,081 · 53 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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