David Nilsen, D.O.
NPI 1588811244ActiveIndividual· Orthopaedic Surgery· Janesville, WI
Orthopaedic Surgery (D.O.) in Janesville, Wisconsin, trained at Michigan State University College of Osteopathic Medicine (class of 2005). 301 Medicare patients in 2024, $71,516 paid; all of their 59 Part D prescriptions were generic. Zimmer Biomet Holdings, Inc. was the largest of 6 companies reporting payments in 2025, $4,709 in all, mostly travel and lodging.
Overview
| NPI | 1588811244 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Aug 25, 2008 |
| Last updated in NPPES | Jun 22, 2026 |
| Certified by provider | Jun 22, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 1735-321 | WI |
| Orthopaedic Surgery | 207X00000X | OS013810 | PA |
| Orthopaedic Surgery | 207X00000X | 005533 | AZ |
| Orthopaedic Surgery | 207X00000X | OT011238 | PA |
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 - Orthopedic Surgery (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 301 |
|---|---|
| Services billed | 954 across 62 procedure codes |
| Paid by Medicare | $71,516 |
Part D prescriptions in 2024
| Prescriptions (claims) | 59 · 60 30-day fills |
|---|---|
| Patients | 43 |
| Total drug cost | $656.69 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Mercy Health System CorporationJanesville, WI · 753 clinicians
Hospital affiliations
- Javon Bea HospitalRockford, IL
- Mercy Health System CorpJanesville, WI
Industry payments (Open Payments)
- 2025$4,709 · 32 payments from 6 companies
- 2024$383.36 · 5 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zimmer Biomet Holdings, Inc. | $1,830 | 12 |
| Arthrex, Inc. | $1,070 | 7 |
| Depuy Synthes Sales Inc. | $796.88 | 5 |
| Enduromed, LLC | $733.66 | 4 |
| Medical Device Business Services, Inc. | $139.24 | 3 |
What the 2025 payments were for
- Travel and Lodging$3,547 · 11 payments
- Food and Beverage$1,162 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Orthopaedic Surgery providers in Janesville
- 1508321209
- 1427095694
- 1225291545