Gail M. Herzig, MD
NPI 1689608440ActiveIndividual· Internal Medicine, Gastroenterology· Acton, MA
Internal Medicine, Gastroenterology (MD) in Acton, Massachusetts, trained at Albany Medical College of Union University (class of 1988). In 2024 Medicare paid $225,282 for 331 patients, and Part D covered 537 of their prescriptions, 81% of them generic. Gilead Sciences, Inc. was the largest of 6 companies reporting payments in 2025, $719.93 in all, mostly food and beverage.
Overview
| NPI | 1689608440 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 10, 2006 |
| Last updated in NPPES | Nov 18, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 80319 | MA |
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 (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 331 |
|---|---|
| Services billed | 9,601 across 33 procedure codes |
| Paid by Medicare | $225,282 |
Part D prescriptions in 2024
| Prescriptions (claims) | 537 · 951 30-day fills |
|---|---|
| Patients | 235 |
| Total drug cost | $272,129 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Middlesex Gastroenterolgy PCActon, MA · 11 clinicians
Hospital affiliation
- Emerson Hospital -W Concord, MA
Industry payments (Open Payments)
- 2025$719.93 · 31 payments from 6 companies
- 2024$961.08 · 32 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $322.92 | 12 |
| Abbvie Inc. | $213.38 | 11 |
| Pfizer Inc. | $91.00 | 4 |
| Regeneron Healthcare Solutions, Inc. | $56.24 | 2 |
| Micro-Tech Endoscopy USA, Inc. | $21.48 | 1 |
What the 2025 payments were for
- Food and Beverage$719.93 · 31 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in Massachusetts →