Quick answers
- Which hospitals does Joseph C. Marek work at?
- Medicare's official clinician data lists Joseph C. Marek at 5 hospitals: Advocate Good Samaritan Hospital, Edward Hospital, Elmhurst Memorial Hospital, Morris Hospital & Healthcare Centers and Northwestern Medicine Central Dupage Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Joseph C. Marek see patients?
- Medicare's clinician data lists 1 practice location in Downers Grove, IL. Call before your visit to confirm the address.
- What is Joseph C. Marek's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Joseph C. Marek accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph C. Marek accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Joseph C. Marek?
- (630) 963-0660, as listed in official Medicare / NPI Registry data.
- What is Joseph C. Marek's NPI number?
- 1548216302. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Joseph C. Marek works
Medicare's Facility Affiliation Data lists Joseph C. Marek at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Good Samaritan HospitalDowners Grove, IL · Acute Care Hospital · CCN 140288
- Edward HospitalNaperville, IL · Acute Care Hospital · CCN 140231
- Elmhurst Memorial HospitalElmhurst, IL · Acute Care Hospital · CCN 140200
- Morris Hospital & Healthcare CentersMorris, IL · Acute Care Hospital · CCN 140101
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
Practice locations
Addresses where Joseph C. Marek is enrolled with Medicare (CMS data updated 2026-10-02).
- 3825 Highland Ave, Suite 400Downers Grove, IL 60515 (630) 963‑0660
Group practices
Medicare enrollment lists Joseph C. Marek as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Illinois →
Other cardiologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548216302 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians