Mark Greaves, M.D.
NPI 1518139914ActiveIndividual· Internal Medicine, Gastroenterology· Hillsborough, NJ
Internal Medicine, Gastroenterology (M.D.) in Hillsborough, New Jersey, trained at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University (class of 2002). In 2024 Medicare paid $434,463 for 812 patients, and Part D covered 1,630 of their prescriptions, 89% of them generic. Janssen Biotech, Inc. was the largest of 6 companies reporting payments in 2025, $736.92 in all, mostly food and beverage.
Overview
| NPI | 1518139914 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 26, 2008 |
| Last updated in NPPES | May 9, 2024 |
| Certified by provider | May 9, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 25MA08345700 | NJ |
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 - Gastroenterology (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 812 |
|---|---|
| Services billed | 24,396 across 55 procedure codes |
| Paid by Medicare | $434,463 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,630 · 3,295 30-day fills |
|---|---|
| Patients | 401 |
| Total drug cost | $556,827 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Digestive Healthcare Center PAHillsborough, NJ · 13 clinicians
Hospital affiliations
- Morristown Medical CenterMorristown, NJ
- Robert Wood Johnson University Hospital - SomersetSomerville, NJ
Industry payments (Open Payments)
- 2025$736.92 · 16 payments from 6 companies
- 2024$323.21 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $201.75 | 4 |
| Boston Scientific Corporation | $124.51 | 2 |
| Phathom Pharmaceuticals, Inc. | $124.09 | 1 |
| Novo Nordisk Inc | $117.76 | 1 |
| Genzyme Corporation | $90.85 | 5 |
What the 2025 payments were for
- Food and Beverage$736.92 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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