Wendy A. Callen, RPAC
NPI 1609851401ActiveIndividual· Physician Assistant, Surgical· Amherst, NY
Physician Assistant, Surgical (RPAC) with Sisters of Charity Hospital of Buffalo New York, practicing in Amherst, New York. Their prescriptions cost Medicare Part D more than their services did: $2,682,602 for 4,096 claims, against $10,238 paid for services in 2024. Mdd US Operations, LLC was the largest of 4 companies reporting payments in 2025, $491.78 in all, mostly food and beverage. Lists Kenmore Mercy Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1609851401 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | RPAC |
| Sole proprietor | No |
| NPI issued | Dec 14, 2005 |
| Last updated in NPPES | Feb 14, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Surgical Primary | 363AS0400X | 0093671 | NY |
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 - Physician Assistant (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 147 |
|---|---|
| Services billed | 210 across 9 procedure codes |
| Paid by Medicare | $10,238 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,096 · 5,552 30-day fills |
|---|---|
| Patients | 612 |
| Total drug cost | $2,682,602 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Sisters of Charity Hospital of Buffalo New YorkBuffalo, NY · 164 clinicians
Hospital affiliations
- Kenmore Mercy HospitalKenmore, NY
- Mount St. Mary's Hospital & Health CenterLewiston, NY
- Sisters of Charity HospitalBuffalo, NY
Industry payments (Open Payments)
- 2025$491.78 · 18 payments from 4 companies
- 2024$2,874 · 106 payments from 27 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mdd US Operations, LLC | $191.68 | 11 |
| Emd Serono, Inc. | $116.85 | 1 |
| Supernus Pharmaceuticals, Inc. | $92.25 | 5 |
| Chiesi USA, Inc. | $91.00 | 1 |
What the 2025 payments were for
- Food and Beverage$491.78 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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