Quick answers
- Which hospitals does Chris J. Geannopoulos work at?
- Medicare's official clinician data lists Chris J. Geannopoulos at 4 hospitals: Advocate Good Samaritan Hospital, Edward Hospital, Elmhurst Memorial Hospital and Northwestern Medicine Central Dupage Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Chris J. Geannopoulos see patients?
- Medicare's clinician data lists 4 practice locations, including Naperville, IL and Elmhurst, IL. Call before your visit to confirm the address.
- What is Chris J. Geannopoulos's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Chris J. Geannopoulos accept Medicare assignment?
- Yes. Medicare's clinician data says Chris J. Geannopoulos 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 Chris J. Geannopoulos?
- (630) 717-2646, as listed in official Medicare / NPI Registry data.
- What is Chris J. Geannopoulos's NPI number?
- 1265407076. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Chris J. Geannopoulos works
Medicare's Facility Affiliation Data lists Chris J. Geannopoulos 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
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
Practice locations
Addresses where Chris J. Geannopoulos is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Spalding Dr, Suite 400Naperville, IL 60540 (630) 717‑2646
- 155 E Brush Hill RdElmhurst, IL 60126 (630) 758‑8000
- 801 S Washington StNaperville, IL 60540 (312) 355‑0450
- 852 S W StNaperville, IL 60540 (630) 603‑5000
Group practices
Medicare enrollment lists Chris J. Geannopoulos as a member of these groups (CMS data updated 2026-10-02).
- Dupage Medical Group Ltd1,322 clinicians in the group
- Edward Hospital96 clinicians in the group
- Elmhurst Memorial Hospital81 clinicians in the group
- Naperville Psychiatric Ventures17 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Illinois →
Other cardiologists in Naperville
Clinicians with the same Medicare primary specialty in Naperville, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Chicago, Pritzker School Of Medicine |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265407076 |
| 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