Janine Marie Ahrens, APNP
NPI 1659390896ActiveIndividual· Nurse Practitioner· Waukesha, WI
Nurse Practitioner (APNP) with Nephrology Associates SC, practicing in Waukesha, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $136,243 for 1,038 claims, against $1,496 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 6 companies reporting payments in 2025, $338.62 in all, mostly food and beverage. Lists Ascension Columbia St Marys Hospital Milwaukee and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1659390896 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APNP |
| Sole proprietor | No |
| NPI issued | Jul 19, 2006 |
| Last updated in NPPES | Feb 5, 2026 |
| Certified by provider | Feb 5, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 1559 | WI |
| Nurse Practitioner, Adult Health | 363LA2200X | 1559-33 | WI |
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 - Nurse Practitioner (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 20 |
|---|---|
| Services billed | 23 across 3 procedure codes |
| Paid by Medicare | $1,496 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,038 · 2,505 30-day fills |
|---|---|
| Patients | 257 |
| Total drug cost | $136,243 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Nephrology Associates SCWaukesha, WI · 8 clinicians
Hospital affiliations
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI
- Aurora Medical CenterGrafton, WI
- Waukesha Memorial HospitalWaukesha, WI
Industry payments (Open Payments)
- 2025$338.62 · 11 payments from 6 companies
- 2024$822.84 · 38 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $209.00 | 5 |
| Novo Nordisk Inc | $51.57 | 2 |
| Ani Pharmaceuticals, Inc. | $29.30 | 1 |
| Ardelyx, Inc. | $20.24 | 1 |
| Aurinia Pharma U.S., Inc. | $14.72 | 1 |
What the 2025 payments were for
- Food and Beverage$338.62 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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