Mary Katherine Kosowski, A-GNP-C
NPI 1558937441ActiveIndividual· Nurse Practitioner, Adult Health· West Seneca, NY
Nurse Practitioner, Adult Health (A-GNP-C) with Trinity Medical Wny PC, practicing in West Seneca, New York. Their prescriptions cost Medicare Part D more than their services did: $1,861,328 for 3,807 claims, against $12,777 paid for services in 2024. Medtronic, Inc. was the largest of 16 companies reporting payments in 2025, $868.13 in all, mostly food and beverage. Lists Brooks-Tlc Hospital System, Inc and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1558937441 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | A-GNP-C |
| Sole proprietor | No |
| NPI issued | Jun 1, 2021 |
| Last updated in NPPES | Aug 28, 2025 |
| Certified by provider | Aug 28, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Adult Health Primary | 363LA2200X | F309522-01 | 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 - Nurse Practitioner (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 119 |
|---|---|
| Services billed | 347 across 8 procedure codes |
| Paid by Medicare | $12,777 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,807 · 7,736 30-day fills |
|---|---|
| Patients | 703 |
| Total drug cost | $1,861,328 |
| Generic share | 33% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Trinity Medical Wny PCBuffalo, NY · 207 clinicians
Hospital affiliations
- Brooks-Tlc Hospital System, IncDunkirk, NY
- Kaleida HealthBuffalo, NY
- Kenmore Mercy HospitalKenmore, NY
- Mercy Hospital of BuffaloBuffalo, NY
- Sisters of Charity HospitalBuffalo, NY
Industry payments (Open Payments)
- 2025$868.13 · 30 payments from 16 companies
- 2024$493.47 · 23 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $289.36 | 4 |
| Amneal Pharmaceuticals LLC | $79.95 | 3 |
| Lilly USA, LLC | $56.33 | 3 |
| Insulet Corporation | $52.86 | 2 |
| Ibsa Pharma Inc. | $51.14 | 3 |
What the 2025 payments were for
- Food and Beverage$868.13 · 30 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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