John C. Lesniak, M.D.
NPI 1912979451ActiveIndividual· Family Medicine· Hartland, WI
Family Medicine (M.D.) in Hartland, Wisconsin, trained at Medical College of Wisconsin (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $345,099 for 5,749 claims, against $53,138 paid for services in 2024.
Overview
| NPI | 1912979451 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 7, 2006 |
| Last updated in NPPES | Apr 20, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 40186 | 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 - Family Practice (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 278 |
|---|---|
| Services billed | 772 across 34 procedure codes |
| Paid by Medicare | $53,138 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,749 · 14,097 30-day fills |
|---|---|
| Patients | 626 |
| Total drug cost | $345,099 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Family Practice |
Medical group
- Prohealth Medical Group IncMukwonago, WI · 479 clinicians
Hospital affiliations
- Froedtert Memorial Lutheran HospitalMilwaukee, WI
- Oconomowoc Memorial HospitalOconomowoc, WI
- Waukesha Memorial HospitalWaukesha, WI
Other facilities
- Prohealth Home CareHome health agency · Waukesha, WI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 17 family medicine physicians in Hartland · All family medicine physicians in Wisconsin