Gregory A. Zemenick, MD
NPI 1396735510ActiveIndividual· Orthopaedic Surgery· Troy, MI
Orthopaedic Surgery (MD) in Troy, Michigan, trained at Wayne State University School of Medicine (class of 1971). 331 Medicare patients in 2024, $126,471 paid; all of their 73 Part D prescriptions were generic. Endo USA, Inc. was the largest of 12 companies reporting payments in 2025, $395.02 in all, mostly food and beverage.
Overview
| NPI | 1396735510 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Oct 27, 2005 |
| Last updated in NPPES | Apr 24, 2026 |
| Certified by provider | Apr 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 4301030702 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 331 |
|---|---|
| Services billed | 4,581 across 52 procedure codes |
| Paid by Medicare | $126,471 |
Part D prescriptions in 2024
| Prescriptions (claims) | 73 · 131 30-day fills |
|---|---|
| Patients | 28 |
| Total drug cost | $718.22 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 1971 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Michigan Orthopaedic Surgeons PLLCBeverly Hills, MI · 127 clinicians
Hospital affiliations
- Beaumont Hospital - Grosse PointeGrosse Pointe, MI
- Beaumont Hospital Royal OakRoyal Oak, MI
- Beaumont Hospital, TroyTroy, MI
Industry payments (Open Payments)
- 2025$395.02 · 21 payments from 12 companies
- 2024$269.04 · 15 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Endo USA, Inc. | $140.10 | 8 |
| Vertex Pharmaceuticals Incorporated | $60.21 | 3 |
| Davol Inc. | $26.08 | 1 |
| Radius Health, Inc. | $26.03 | 1 |
| Solventum Corporation | $22.77 | 1 |
What the 2025 payments were for
- Food and Beverage$395.02 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 45 orthopedic surgeons in Troy · All orthopedic surgeons in Michigan