Marielle Ferstenberg-Osypian, D.O.
NPI 1922445220ActiveIndividual· Surgery· Williamsville, NY
Surgery (D.O.) with Windsong Health Medical Alliance PLLC, practicing in Williamsville, New York. 53 Medicare patients in 2024, $21,800 paid; all of their 90 Part D prescriptions were generic. Merck Sharp & Dohme LLC was the largest of 5 companies reporting payments in 2025, $268.98 in all, mostly food and beverage. Lists Kaleida Health and 1 other hospital as hospital affiliations.
Overview
| NPI | 1922445220 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | May 28, 2013 |
| Last updated in NPPES | Jan 14, 2020 |
| Certified by provider | Jan 14, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 299626 | NY |
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 - Surgical Oncology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 53 |
|---|---|
| Services billed | 144 across 15 procedure codes |
| Paid by Medicare | $21,800 |
Part D prescriptions in 2024
| Prescriptions (claims) | 90 · 90 30-day fills |
|---|---|
| Patients | 76 |
| Total drug cost | $351.17 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Surgical Oncology |
Medical group
- Windsong Health Medical Alliance PLLCWilliamsville, NY · 4 clinicians
Hospital affiliations
- Kaleida HealthBuffalo, NY
- Sisters of Charity HospitalBuffalo, NY
Industry payments (Open Payments)
- 2025$268.98 · 9 payments from 5 companies
- 2024$260.96 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $111.72 | 5 |
| Elucent Medical | $96.12 | 1 |
| Hologic Sales and Service, LLC | $26.58 | 1 |
| Tactile Systems Technology Inc | $20.42 | 1 |
| Medtronic, Inc. | $14.14 | 1 |
What the 2025 payments were for
- Food and Beverage$268.98 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 general surgeons in Williamsville · All general surgeons in New York