Robert Stephen Nierzwicki, M.D.
NPI 1194985564ActiveIndividual· Internal Medicine, Cardiovascular Disease· Winfield, IL
Internal Medicine, Cardiovascular Disease (M.D.) in Winfield, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $927,514 for 4,438 claims, against $179,889 paid for services in 2024.
Overview
| NPI | 1194985564 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 10, 2008 |
| Last updated in NPPES | Jun 3, 2024 |
| Certified by provider | Jun 3, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 036123450 | 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 - Cardiovascular Disease (Cardiology) (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 2,551 |
|---|---|
| Services billed | 4,571 across 40 procedure codes |
| Paid by Medicare | $179,889 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,438 · 12,017 30-day fills |
|---|---|
| Patients | 702 |
| Total drug cost | $927,514 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine Delnor Community HospitalGeneva, IL
- Northwestern Medicine Kishwaukee HospitalDekalb, IL
- Northwestern Memorial HospitalChicago, IL
- Palos Community HospitalPalos Heights, IL
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 18 cardiologists in Winfield · All cardiologists in Illinois