Katharine Windriver Ross, PA-C
NPI 1053036962ActiveIndividual· Physician Assistant· Peoria, AZ
Physician Assistant (PA-C) in Peoria, Arizona, trained at Midwestern University College of Dental Medicine, Glendale (class of 2022). Their prescriptions cost Medicare Part D more than their services did: $219,634 for 993 claims, against $2,935 paid for services in 2024. Amgen Inc. was the largest of 8 companies reporting payments in 2025, $879.69 in all, mostly food and beverage.
Overview
| NPI | 1053036962 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 4, 2022 |
| Last updated in NPPES | Dec 29, 2022 |
| Certified by provider | Dec 29, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | — | — |
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 - Physician Assistant (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 45 |
|---|---|
| Services billed | 68 across 8 procedure codes |
| Paid by Medicare | $2,935 |
Part D prescriptions in 2024
| Prescriptions (claims) | 993 · 2,405 30-day fills |
|---|---|
| Patients | 337 |
| Total drug cost | $219,634 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Midwestern University College of Dental Medicine, Glendale |
|---|---|
| Graduation year | 2022 |
| Medicare specialty | Physician Assistant |
Hospital affiliation
- Banner Boswell Medical CenterSun City, AZ
Industry payments (Open Payments)
- 2025$879.69 · 32 payments from 8 companies
- 2024$684.97 · 24 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $189.23 | 7 |
| Merck Sharp & Dohme LLC | $186.78 | 6 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $162.36 | 7 |
| Novartis Pharmaceuticals Corporation | $129.90 | 5 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $108.36 | 3 |
What the 2025 payments were for
- Food and Beverage$879.69 · 32 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 114 physician assistants in Peoria · All physician assistants in Arizona