Thomas Mastri, M.D.
NPI 1073566642ActiveIndividual· Internal Medicine, Gastroenterology· Fredericksburg, VA
Internal Medicine, Gastroenterology (M.D.) with Fall Hill Gastroenterology Associates, Ltd., practicing in Fredericksburg, Virginia. Their prescriptions cost Medicare Part D more than their services did: $442,499 for 1,410 claims, against $142,890 paid for services in 2024. Janssen Biotech, Inc. was the largest of 10 companies reporting payments in 2025, $528.04 in all, mostly food and beverage. Lists Mary Washington Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1073566642 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 17, 2006 |
| Last updated in NPPES | Jan 31, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 0101228933 | VA |
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 (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 724 |
|---|---|
| Services billed | 1,494 across 42 procedure codes |
| Paid by Medicare | $142,890 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,410 · 3,069 30-day fills |
|---|---|
| Patients | 354 |
| Total drug cost | $442,499 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Fall Hill Gastroenterology Associates, Ltd.Fredericksburg, VA · 5 clinicians
Hospital affiliations
- Mary Washington HospitalFredericksburg, VA
- Stafford Hospital, LLCStafford, VA
Industry payments (Open Payments)
- 2025$528.04 · 26 payments from 10 companies
- 2024$567.94 · 28 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $168.99 | 9 |
| Takeda Pharmaceuticals U.S.A., Inc. | $83.94 | 4 |
| Celltrion USA Inc. | $76.90 | 3 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $51.56 | 2 |
| Ardelyx, Inc. | $32.98 | 2 |
What the 2025 payments were for
- Food and Beverage$528.04 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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