Marlena Osowski
NPI 1386335776ActiveIndividual· Registered Nurse· Boston, MA
Registered Nurse with Gbgastro LLC and 1 other group, practicing in Boston, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $24,065 for 97 claims, against $5,548 paid for services in 2024. Genzyme Corporation was the largest of 5 companies reporting payments in 2025, $112.11 in all, mostly food and beverage. Lists Metrowest Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1386335776 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | May 16, 2023 |
| Last updated in NPPES | May 16, 2023 |
| Certified by provider | May 11, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Registered Nurse Primary | 163W00000X | RN2354068 | 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 - Nurse Practitioner (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 54 |
|---|---|
| Services billed | 61 across 9 procedure codes |
| Paid by Medicare | $5,548 |
Part D prescriptions in 2024
| Prescriptions (claims) | 97 · 206 30-day fills |
|---|---|
| Patients | 57 |
| Total drug cost | $24,065 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical groups
- Gbgastro LLCFramingham, MA · 20 clinicians
- Greater Boston GastroenterologyFramingham, MA · 20 clinicians
Hospital affiliations
- Metrowest Medical CenterFramingham, MA
- Newton-Wellesley HospitalNewton, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Industry payments (Open Payments)
- 2025$112.11 · 5 payments from 5 companies
- 2024$392.99 · 15 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $39.22 | 1 |
| Gilead Sciences, Inc. | $22.23 | 1 |
| Lucid Diagnostics Inc. | $17.75 | 1 |
| Takeda Pharmaceuticals U.S.A., Inc. | $17.58 | 1 |
| Lilly USA, LLC | $15.33 | 1 |
What the 2025 payments were for
- Food and Beverage$112.11 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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