Maren Patricia Ernst, CNP
NPI 1831800697ActiveIndividual· Nurse Practitioner· Sioux Falls, SD
Nurse Practitioner (CNP) with Avera McKennan, practicing in Sioux Falls, South Dakota. Their prescriptions cost Medicare Part D more than their services did: $104,067 for 66 claims, against $7,953 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 4 companies reporting payments in 2025, $79.56 in all, mostly food and beverage. Lists Avera McKennan Hospital & University Health Center as a hospital affiliation.
Overview
| NPI | 1831800697 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CNP |
| Sole proprietor | Yes |
| NPI issued | Dec 12, 2022 |
| Last updated in NPPES | Dec 12, 2022 |
| Certified by provider | Dec 12, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | CP002610 | SD |
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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 74 |
|---|---|
| Services billed | 102 across 5 procedure codes |
| Paid by Medicare | $7,953 |
Part D prescriptions in 2024
| Prescriptions (claims) | 66 · 78 30-day fills |
|---|---|
| Patients | 37 |
| Total drug cost | $104,067 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 2022 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Avera McKennanSioux Falls, SD · 959 clinicians
Hospital affiliation
- Avera McKennan Hospital & University Health CenterSioux Falls, SD
Industry payments (Open Payments)
- 2025$79.56 · 4 payments from 4 companies
- 2024$56.90 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $27.49 | 1 |
| Daiichi Sankyo Inc. | $20.10 | 1 |
| Jazz Pharmaceuticals Inc. | $16.57 | 1 |
| Eisai Inc. | $15.40 | 1 |
What the 2025 payments were for
- Food and Beverage$79.56 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 249 nurse practitioners in Sioux Falls · All nurse practitioners in South Dakota