Michael Thomas Flisak, DO
NPI 1548426943ActiveIndividual· Internal Medicine, Interventional Cardiology· Michigan City, IN
Internal Medicine, Interventional Cardiology (DO) in Michigan City, Indiana, trained at Midwestern University, Chicago College of Osteopathic Med (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $293,486 for 1,880 claims, against $58,008 paid for services in 2024. Pfizer Inc. was the largest of 2 companies reporting payments in 2025, $60.06 in all, mostly food and beverage.
Overview
| NPI | 1548426943 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 5, 2008 |
| Last updated in NPPES | Mar 5, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Interventional Cardiology Primary | 207RI0011X | 02005248 | IN |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 036118827 | IL |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 55811 | WI |
| Internal Medicine, Interventional Cardiology | 207RI0011X | 036118827 | IL |
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 - Interventional Cardiology (IL); Practitioner - Cardiovascular Disease (Cardiology) (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 564 |
|---|---|
| Services billed | 976 across 63 procedure codes |
| Paid by Medicare | $58,008 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,880 · 3,922 30-day fills |
|---|---|
| Patients | 289 |
| Total drug cost | $293,486 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Ascension Medical Group-Southeast Wisconsin IncBrookfield, WI · 545 clinicians
Hospital affiliations
- Ascension All Saints HospitalRacine, WI
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI
Industry payments (Open Payments)
- 2025$60.06 · 2 payments from 2 companies
- 2024$919.09 · 6 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $37.58 | 1 |
| Scpharmaceuticals Inc. | $22.48 | 1 |
What the 2025 payments were for
- Food and Beverage$60.06 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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