Marc A. Zitin, M.D.
NPI 1548237423ActiveIndividual· Internal Medicine, Gastroenterology· Wynnewood, PA
Internal Medicine, Gastroenterology (M.D.) in Wynnewood, Pennsylvania, trained at Hahnemann University College of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $757,581 for 1,231 claims, against $126,689 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $1,938 in all, mostly food and beverage.
Overview
| NPI | 1548237423 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 1, 2006 |
| Last updated in NPPES | Nov 2, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD038071E | 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 - Gastroenterology (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 457 |
|---|---|
| Services billed | 4,079 across 37 procedure codes |
| Paid by Medicare | $126,689 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,231 · 2,070 30-day fills |
|---|---|
| Patients | 307 |
| Total drug cost | $757,581 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Hahnemann University College of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Gastroenterology |
Medical group
- Regional Gastroenterology Associates of Lancaster, Ltd.Lancaster, PA · 244 clinicians
Hospital affiliation
- Main Line Hospital LankenauWynnewood, PA
Industry payments (Open Payments)
- 2025$1,938 · 91 payments from 18 companies
- 2024$2,218 · 119 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $404.15 | 23 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $361.27 | 18 |
| Madrigal Pharmaceuticals | $211.44 | 6 |
| Takeda Pharmaceuticals U.S.A., Inc. | $150.87 | 6 |
| Lilly USA, LLC | $146.74 | 6 |
What the 2025 payments were for
- Food and Beverage$1,928 · 90 payments
- Education$10.48 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 gastroenterologists in Wynnewood · All gastroenterologists in Pennsylvania