Joseph Clarence Marek, MD
NPI 1548216302ActiveIndividual· Internal Medicine, Cardiovascular Disease· Downers Grove, IL
Internal Medicine, Cardiovascular Disease (MD) in Downers Grove, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1975). Their prescriptions cost Medicare Part D more than their services did: $328,498 for 3,663 claims, against $98,852 paid for services in 2024. Cardiva Medical, Inc. was the largest of 4 companies reporting payments in 2025, $473.98 in all, mostly food and beverage.
Overview
| NPI | 1548216302 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 25, 2006 |
| Last updated in NPPES | Apr 15, 2025 |
| Certified by provider | Apr 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 036059600 | 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 | 402 |
|---|---|
| Services billed | 1,075 across 23 procedure codes |
| Paid by Medicare | $98,852 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,663 · 10,482 30-day fills |
|---|---|
| Patients | 421 |
| Total drug cost | $328,498 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical group
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
Hospital affiliations
- Advocate Good Samaritan HospitalDowners Grove, IL
- Edward HospitalNaperville, IL
- Elmhurst Memorial HospitalElmhurst, IL
- Morris Hospital & Healthcare CentersMorris, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
Industry payments (Open Payments)
- 2025$473.98 · 10 payments from 4 companies
- 2024$171.55 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Cardiva Medical, Inc. | $306.44 | 7 |
| Actelion Pharmaceuticals US, Inc. | $116.78 | 1 |
| Cvrx, Inc. | $26.05 | 1 |
| Abbott Laboratories | $24.71 | 1 |
What the 2025 payments were for
- Food and Beverage$473.98 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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