Michael Steven Grenis, MD
NPI 1669546834ActiveIndividual· Orthopaedic Surgery· Princeton, NJ
Orthopaedic Surgery (MD) in Princeton, New Jersey, trained at New York Medical College (class of 1984). 727 Medicare patients in 2024, $221,396 paid; nearly all of their 141 Part D prescriptions were generic (96%). Pacira Pharmaceuticals Incorporated reported $120.29 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1669546834 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 20, 2006 |
| Last updated in NPPES | Sep 30, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 25MA05473100 | NJ |
| Orthopaedic Surgery | 207X00000X | MD442362 | PA |
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 (NJ); Practitioner - Orthopedic Surgery (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 727 |
|---|---|
| Services billed | 11,246 across 60 procedure codes |
| Paid by Medicare | $221,396 |
Part D prescriptions in 2024
| Prescriptions (claims) | 141 · 142 30-day fills |
|---|---|
| Patients | 117 |
| Total drug cost | $7,578 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Orthopedic Surgery |
Medical groups
- Phoenix Rehabilitation and Health Services IncCranberry Twp, PA · 2,800 clinicians
- Orthonj LLCSomerset, NJ · 304 clinicians
Hospital affiliation
- University Medical Center of Princeton at PlainsboroPlainsboro, NJ
Other facilities
- Kessler Rehab CenterInpatient rehabilitation facility · West Orange, NJ
- Good Shepherd Penn PartnersLong-term care hospital · Philadelphia, PA
Industry payments (Open Payments)
- 2025$120.29 · 1 payment from 1 company
- 2024$50.11 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pacira Pharmaceuticals Incorporated | $120.29 | 1 |
What the 2025 payments were for
- Food and Beverage$120.29 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 orthopedic surgeons in Princeton · All orthopedic surgeons in New Jersey