Catherine Powers Zellmer, PA
NPI 1861754715ActiveIndividual· Physician Assistant· Mequon, WI
Physician Assistant (PA) with Columbia St Marys Hospital Milwaukee Inc, practicing in Mequon, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $230,488 for 432 claims, against $3,266 paid for services in 2024. Novo Nordisk Inc reported $15.02 in payments in 2025, mostly food and beverage. Lists Ascension Columbia St Marys Hospital Milwaukee as a hospital affiliation.
Overview
| NPI | 1861754715 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Jun 15, 2012 |
| Last updated in NPPES | Feb 21, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 2948 | WI |
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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 25 |
|---|---|
| Services billed | 59 across 4 procedure codes |
| Paid by Medicare | $3,266 |
Part D prescriptions in 2024
| Prescriptions (claims) | 432 · 617 30-day fills |
|---|---|
| Patients | 100 |
| Total drug cost | $230,488 |
| Generic share | 56% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Columbia St Marys Hospital Milwaukee IncMilwaukee, WI · 306 clinicians
Hospital affiliation
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI
Industry payments (Open Payments)
- 2025$15.02 · 1 payment from 1 company
- 2024$35.71 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $15.02 | 1 |
What the 2025 payments were for
- Food and Beverage$15.02 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 37 physician assistants in Mequon · All physician assistants in Wisconsin