Tomasz J. Niewiarowski, M.D.
NPI 1073624441ActiveIndividual· Internal Medicine, Gastroenterology· Bethlehem, PA
Internal Medicine, Gastroenterology (M.D.) with Geisinger Clinic and 2 other groups, practicing in Bethlehem, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $398,909 for 710 claims, against $140,333 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $625.52 in all, mostly food and beverage. Lists Geisinger Wyoming Valley Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1073624441 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 31, 2006 |
| Last updated in NPPES | May 29, 2024 |
| Certified by provider | May 21, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD040218L | PA |
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 (MD); Practitioner - Gastroenterology (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 386 |
|---|---|
| Services billed | 8,433 across 92 procedure codes |
| Paid by Medicare | $140,333 |
Part D prescriptions in 2024
| Prescriptions (claims) | 710 · 1,453 30-day fills |
|---|---|
| Patients | 197 |
| Total drug cost | $398,909 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1982 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical groups
- Geisinger ClinicDanville, PA · 3,467 clinicians
- Mount Nittany Medical Center Health Services IncState College, PA · 367 clinicians
- Vita Medical Associates, PCBethlehem, PA · 4 clinicians
Hospital affiliations
- Geisinger Wyoming Valley Medical CenterWilkes Barre, PA
- Lehigh Valley HospitalAllentown, PA
- Mount Nittany Medical CenterState College, PA
- St Luke's Hospital - Easton CampusEaston, PA
- St Lukes HospitalBethlehem, PA
Industry payments (Open Payments)
- 2025$625.52 · 28 payments from 18 companies
- 2024$856.40 · 39 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $138.83 | 6 |
| Pfizer Inc. | $63.08 | 4 |
| Daiichi Sankyo Inc. | $47.88 | 2 |
| Ardelyx, Inc. | $45.25 | 2 |
| Iovance Biotherapeutics, Inc. | $31.26 | 1 |
What the 2025 payments were for
- Food and Beverage$625.52 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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