Diane Sue Wilken, FNP-C
NPI 1245802032ActiveIndividual· Nurse Practitioner· Eau Claire, WI
Nurse Practitioner (FNP-C) with Monument Health Network Inc, practicing in Eau Claire, Wisconsin. 237 Medicare patients in 2024, $19,637 paid; nearly all of their 312 Part D prescriptions were generic (91%). Novartis Pharmaceuticals Corporation was the largest of 5 companies reporting payments in 2025, $80.41 in all, mostly food and beverage. Lists Monument Health Custer Hospital as a hospital affiliation.
Overview
| NPI | 1245802032 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP-C |
| Sole proprietor | No |
| NPI issued | Jul 12, 2021 |
| Last updated in NPPES | Feb 4, 2026 |
| Certified by provider | Feb 4, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 11077-33 | WI |
| Nurse Practitioner, Family | 363LF0000X | 11077-33 | 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 - Nurse Practitioner (SD); Practitioner - Nurse Practitioner (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 237 |
|---|---|
| Services billed | 290 across 22 procedure codes |
| Paid by Medicare | $19,637 |
Part D prescriptions in 2024
| Prescriptions (claims) | 312 · 313 30-day fills |
|---|---|
| Patients | 226 |
| Total drug cost | $4,373 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Monument Health Network IncSpearfish, SD · 160 clinicians
Hospital affiliation
- Monument Health Custer HospitalCuster, SD
Industry payments (Open Payments)
- 2025$80.41 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $19.46 | 1 |
| Novo Nordisk Inc | $17.22 | 1 |
| Lilly USA, LLC | $15.81 | 1 |
| Pfizer Inc. | $14.43 | 1 |
| Merck Sharp & Dohme LLC | $13.49 | 1 |
What the 2025 payments were for
- Food and Beverage$80.41 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 185 nurse practitioners in Eau Claire · All nurse practitioners in Wisconsin