Alan M. Mermelstein, MD
NPI 1073520458ActiveIndividual· Internal Medicine, Gastroenterology· Phila, PA
Internal Medicine, Gastroenterology (MD) in Phila, Pennsylvania, trained at Temple University School of Medicine (class of 1983). 406 Medicare patients in 2024, $94,250 paid; nearly all of their 434 Part D prescriptions were generic (91%). Qol Medical, LLC was the largest of 12 companies reporting payments in 2025, $922.68 in all, mostly food and beverage.
Overview
| NPI | 1073520458 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 1, 2006 |
| Last updated in NPPES | Sep 14, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD033183E | 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 | 406 |
|---|---|
| Services billed | 1,145 across 23 procedure codes |
| Paid by Medicare | $94,250 |
Part D prescriptions in 2024
| Prescriptions (claims) | 434 · 767 30-day fills |
|---|---|
| Patients | 160 |
| Total drug cost | $71,544 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Gastroenterology |
Medical group
- Trinity Health Mid-Atlantic Medical GroupLanghorne, PA · 334 clinicians
Hospital affiliation
- Nazareth HospitalPhiladelphia, PA
Industry payments (Open Payments)
- 2025$922.68 · 46 payments from 12 companies
- 2024$1,425 · 71 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Qol Medical, LLC | $181.10 | 10 |
| Abbvie Inc. | $135.41 | 7 |
| Gilead Sciences, Inc. | $110.26 | 6 |
| Janssen Biotech, Inc. | $106.37 | 5 |
| Ipsen Biopharmaceuticals, Inc | $78.58 | 3 |
What the 2025 payments were for
- Food and Beverage$902.25 · 43 payments
- Education$20.43 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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