John F. Nielsen, M.D.
NPI 1003811415ActiveIndividual· Family Medicine· Marinette, WI
Family Medicine (M.D.) with Aurora Medical Group, Inc., practicing in Marinette, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $276,809 for 3,368 claims, against $17,690 paid for services in 2024. Astrazeneca Pharmaceuticals LP reported $14.69 in payments in 2025, mostly food and beverage. Lists Aurora Baycare Medical Ctr and 1 other hospital as hospital affiliations.
Overview
| NPI | 1003811415 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 14, 2005 |
| Last updated in NPPES | Dec 10, 2024 |
| Certified by provider | Dec 10, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 75212-20 | WI |
| Family Medicine | 207Q00000X | J8333 | TX |
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 - Family Practice (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 138 |
|---|---|
| Services billed | 350 across 18 procedure codes |
| Paid by Medicare | $17,690 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,368 · 6,391 30-day fills |
|---|---|
| Patients | 288 |
| Total drug cost | $276,809 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- Aurora Medical Group, Inc.Milwaukee, WI · 3,813 clinicians
Hospital affiliations
- Aurora Baycare Medical CtrGreen Bay, WI
- Aurora Medical Center Bay AreaMarinette, WI
Industry payments (Open Payments)
- 2025$14.69 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $14.69 | 1 |
What the 2025 payments were for
- Food and Beverage$14.69 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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