Michael J. Fleissner, MD
NPI 1942289459ActiveIndividual· Internal Medicine, Cardiovascular Disease· Belleville, IL
Internal Medicine, Cardiovascular Disease (MD) in Belleville, Illinois, trained at Medical College of Wisconsin (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $1,245,334 for 5,549 claims, against $129,691 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 6 companies reporting payments in 2025, $116.20 in all, mostly food and beverage.
Overview
| NPI | 1942289459 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 12, 2006 |
| Last updated in NPPES | Sep 29, 2026 |
| Certified by provider | Apr 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 036.084308 | IL |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 100821 | MO |
| Specialist | 174400000X | MD100821 | MO |
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 - Interventional Cardiology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 916 |
|---|---|
| Services billed | 2,177 across 64 procedure codes |
| Paid by Medicare | $129,691 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,549 · 13,941 30-day fills |
|---|---|
| Patients | 751 |
| Total drug cost | $1,245,334 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Interventional Cardiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical group
- Fairview Heights Medical Group SCAlton, IL · 444 clinicians
Hospital affiliations
- Anderson HospitalMaryville, IL
- Community Hospital of StauntonStaunton, IL
- Memorial HospitalBelleville, IL
Industry payments (Open Payments)
- 2025$116.20 · 6 payments from 6 companies
- 2024$439.64 · 15 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $24.08 | 1 |
| Pfizer Inc. | $22.66 | 1 |
| Merck Sharp & Dohme LLC | $20.71 | 1 |
| Novo Nordisk Inc | $19.99 | 1 |
| E.R. Squibb & Sons, L.L.C. | $15.26 | 1 |
What the 2025 payments were for
- Food and Beverage$116.20 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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