Mark Philip Epstein, M.D.
NPI 1891760005ActiveIndividual· Specialist· Concord, MA
Specialist (M.D.) with Middlesex Gastroenterolgy PC, practicing in Concord, Massachusetts. In 2024 Medicare paid $102,174 for 355 patients, and Part D covered 537 of their prescriptions, 87% of them generic. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $1,959 in all, mostly food and beverage. Lists Emerson Hospital - as a hospital affiliation.
Overview
| NPI | 1891760005 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 21, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | 157680 | MA |
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 (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 355 |
|---|---|
| Services billed | 2,375 across 31 procedure codes |
| Paid by Medicare | $102,174 |
Part D prescriptions in 2024
| Prescriptions (claims) | 537 · 897 30-day fills |
|---|---|
| Patients | 254 |
| Total drug cost | $42,896 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Middlesex Gastroenterolgy PCActon, MA · 11 clinicians
Hospital affiliation
- Emerson Hospital -W Concord, MA
Industry payments (Open Payments)
- 2025$1,959 · 82 payments from 18 companies
- 2024$1,631 · 77 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $584.26 | 28 |
| Gilead Sciences, Inc. | $340.32 | 13 |
| Genzyme Corporation | $202.71 | 7 |
| Pfizer Inc. | $180.98 | 8 |
| Janssen Biotech, Inc. | $141.32 | 1 |
What the 2025 payments were for
- Food and Beverage$1,947 · 81 payments
- Education$12.42 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 Specialist providers in Concord · All Specialist providers in Massachusetts