Wilson C. Mertens, M.D.
NPI 1427016484ActiveIndividual· Internal Medicine, Medical Oncology· Springfield, MA
Internal Medicine, Medical Oncology (M.D.) with Baystate Medical Practices Inc, practicing in Springfield, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $420,264 for 104 claims, against $18,436 paid for services in 2024. Lists Baystate Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1427016484 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 1, 2006 |
| Last updated in NPPES | Nov 14, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 203709 | MA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 203709 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 140 |
|---|---|
| Services billed | 236 across 9 procedure codes |
| Paid by Medicare | $18,436 |
Part D prescriptions in 2024
| Prescriptions (claims) | 104 · 142 30-day fills |
|---|---|
| Patients | 30 |
| Total drug cost | $420,264 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1982 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical group
- Baystate Medical Practices IncSpringfield, MA · 1,369 clinicians
Hospital affiliations
- Baystate Medical CenterSpringfield, MA
- Baystate Noble HospitalWestfield, MA
Other facilities
- Baystate HospiceHospice · West Springfield, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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