Frank V. Linn Jr., M.D.
NPI 1639250327ActiveIndividual· Internal Medicine, Gastroenterology· Concord, MA
Internal Medicine, Gastroenterology (M.D.) in Concord, Massachusetts, trained at University of Michigan Medical School (class of 1983). In 2024 Medicare paid $63,882 for 308 patients, and Part D covered 517 of their prescriptions, 88% of them generic. Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $2,484 in all, mostly food and beverage.
Overview
| NPI | 1639250327 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 18, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 58433 | 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 | 308 |
|---|---|
| Services billed | 599 across 31 procedure codes |
| Paid by Medicare | $63,882 |
Part D prescriptions in 2024
| Prescriptions (claims) | 517 · 961 30-day fills |
|---|---|
| Patients | 218 |
| Total drug cost | $51,528 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Middlesex Gastroenterolgy PCActon, MA · 11 clinicians
Hospital affiliation
- Emerson Hospital -W Concord, MA
Industry payments (Open Payments)
- 2025$2,484 · 111 payments from 20 companies
- 2024$2,454 · 105 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $551.26 | 27 |
| Takeda Pharmaceuticals U.S.A., Inc. | $413.09 | 19 |
| Janssen Biotech, Inc. | $240.64 | 6 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $177.36 | 14 |
| Gilead Sciences, Inc. | $175.01 | 7 |
What the 2025 payments were for
- Food and Beverage$2,484 · 111 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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