Michael Eugene Tjarksen, M.D.
NPI 1639152747ActiveIndividual· Orthopaedic Surgery· Pewaukee, WI
Orthopaedic Surgery (M.D.) in Pewaukee, Wisconsin, trained at University of Michigan Medical School (class of 1991). 171 Medicare patients in 2024, $66,346 paid; all of their 92 Part D prescriptions were generic. Medtronic, Inc. was the largest of 2 companies reporting payments in 2025, $122.34 in all, mostly food and beverage.
Overview
| NPI | 1639152747 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 22, 2005 |
| Last updated in NPPES | Dec 27, 2019 |
| Certified by provider | Dec 27, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 39946 | WI |
| Orthopaedic Surgery, Orthopaedic Surgery of the Spine | 207XS0117X | 39946 | 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 - Orthopedic Surgery (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 171 |
|---|---|
| Services billed | 597 across 60 procedure codes |
| Paid by Medicare | $66,346 |
Part D prescriptions in 2024
| Prescriptions (claims) | 92 · 94 30-day fills |
|---|---|
| Patients | 57 |
| Total drug cost | $712.56 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Orthopaedic Associates of Wisconsin SCPewaukee, WI · 109 clinicians
Hospital affiliation
- Waukesha Memorial HospitalWaukesha, WI
Industry payments (Open Payments)
- 2025$122.34 · 2 payments from 2 companies
- 2024$142.79 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $100.35 | 1 |
| Hospira, Inc. | $21.99 | 1 |
What the 2025 payments were for
- Food and Beverage$122.34 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other orthopedic surgeons in Pewaukee
- 1053793208
- 1104809458
- 1124381710
- 1134124803
- 1215226436
- 1336122712
- 1396727905
- 1588627368
- 1629050216
- 1689787764
- 1750657904
- 1770016008
All 19 orthopedic surgeons in Pewaukee · All orthopedic surgeons in Wisconsin