Marc Fenster, MD
NPI 1144751595ActiveIndividual· Internal Medicine, Gastroenterology· Cedarhurst, NY
Internal Medicine, Gastroenterology (MD) in Cedarhurst, New York, trained at Albert Einstein College of Medicine of Yeshiva University (class of 2017). Their prescriptions cost Medicare Part D more than their services did: $70,056 for 500 claims, against $5,277 paid for services in 2024. Abbvie Inc. was the largest of 17 companies reporting payments in 2025, $2,200 in all, mostly food and beverage.
Overview
| NPI | 1144751595 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 27, 2017 |
| Last updated in NPPES | Aug 23, 2023 |
| Certified by provider | Aug 23, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 302653 | 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 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 (NY); Practitioner - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 54 |
|---|---|
| Services billed | 60 across 12 procedure codes |
| Paid by Medicare | $5,277 |
Part D prescriptions in 2024
| Prescriptions (claims) | 500 · 538 30-day fills |
|---|---|
| Patients | 268 |
| Total drug cost | $70,056 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Internal Medicine |
Medical groups
- St John's Medical Services PCRockaway Park, NY · 90 clinicians
- Five Towns GastroenterologyOceanside, NY · 3 clinicians
Hospital affiliation
- St John's Episcopal Hospital at South ShoreFar Rockaway, NY
Industry payments (Open Payments)
- 2025$2,200 · 75 payments from 17 companies
- 2024$1,977 · 65 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $453.36 | 15 |
| Janssen Biotech, Inc. | $290.24 | 12 |
| Lilly USA, LLC | $257.32 | 8 |
| Madrigal Pharmaceuticals | $227.89 | 7 |
| Takeda Pharmaceuticals U.S.A., Inc. | $173.29 | 6 |
What the 2025 payments were for
- Food and Beverage$2,200 · 75 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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