Thomas Dunzendorfer, M.D.
NPI 1194786210ActiveIndividual· Internal Medicine, Gastroenterology· Pittsfield, MA
Internal Medicine, Gastroenterology (M.D.) with Henry Heywood Memorial Hospital and 2 other groups, practicing in Pittsfield, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $345,618 for 726 claims, against $65,130 paid for services in 2024. Janssen Biotech, Inc. was the largest of 8 companies reporting payments in 2025, $382.00 in all, mostly food and beverage. Lists Athol Memorial Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1194786210 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 29, 2006 |
| Last updated in NPPES | Oct 4, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 73558 | 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 | 317 |
|---|---|
| Services billed | 605 across 29 procedure codes |
| Paid by Medicare | $65,130 |
Part D prescriptions in 2024
| Prescriptions (claims) | 726 · 1,050 30-day fills |
|---|---|
| Patients | 156 |
| Total drug cost | $345,618 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical groups
- Henry Heywood Memorial HospitalGardner, MA · 115 clinicians
- Heywood Medical Group Inc.Gardner, MA · 110 clinicians
- Athol Memorial Hospital IncorporatedAthol, MA · 74 clinicians
Hospital affiliations
- Athol Memorial HospitalAthol, MA
- Heywood Hospital -Gardner, MA
Industry payments (Open Payments)
- 2025$382.00 · 21 payments from 8 companies
- 2024$158.50 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $158.62 | 10 |
| Takeda Pharmaceuticals U.S.A., Inc. | $74.36 | 4 |
| Ardelyx, Inc. | $34.15 | 2 |
| Myriad Genetic Laboratories, Inc. | $27.08 | 1 |
| Boston Scientific Corporation | $24.01 | 1 |
What the 2025 payments were for
- Food and Beverage$382.00 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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