Martin Greenfield, MD
NPI 1205831443ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· New Hyde Park, NY
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in New Hyde Park, New York, trained at State University of New York Downstate Medical Center (class of 1968). Their prescriptions cost Medicare Part D more than their services did: $2,299,291 for 4,942 claims, against $263,176 paid for services in 2024. Novo Nordisk Inc was the largest of 4 companies reporting payments in 2025, $267.95 in all, mostly food and beverage.
Overview
| NPI | 1205831443 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 15, 2005 |
| Last updated in NPPES | Apr 6, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 103688 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 474 |
|---|---|
| Services billed | 12,937 across 49 procedure codes |
| Paid by Medicare | $263,176 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,942 · 12,681 30-day fills |
|---|---|
| Patients | 532 |
| Total drug cost | $2,299,291 |
| Generic share | 50% of claims |
Education and affiliations
| Medical school | State University of New York Downstate Medical Center |
|---|---|
| Graduation year | 1968 |
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Optum Medical Care PCPoughkeepsie, NY · 1,010 clinicians
Industry payments (Open Payments)
- 2025$267.95 · 15 payments from 4 companies
- 2024$33.58 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $159.34 | 11 |
| Amgen Inc. | $46.23 | 2 |
| Medtronic, Inc. | $39.76 | 1 |
| Amneal Pharmaceuticals LLC | $22.62 | 1 |
What the 2025 payments were for
- Food and Beverage$267.95 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Endocrinology, Diabetes & Metabolism providers in New Hyde Park
- 1790922888
- 1285600973
- 1407483621
- 1316396294
- 1154381929
- 1629196001
- 1902006398
- 1255391017
- 1356964258
- 1124475751
- 1043577067
- 1750340121
All Internal Medicine, Endocrinology, Diabetes & Metabolism providers in New York →