Quick answers
- Which hospitals does Gregory Nacopoulos work at?
- Medicare's official clinician data lists Gregory Nacopoulos at 2 hospitals: Roseland Community Hospital and Thorek Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Nacopoulos see patients?
- Medicare's clinician data lists 1 practice location in Chicago, IL. Call before your visit to confirm the address.
- What is Gregory Nacopoulos's specialty?
- Medicare lists General Surgery as the primary specialty, and also Vascular Surgery.
- Does Gregory Nacopoulos accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Nacopoulos 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 Gregory Nacopoulos?
- (773) 525-6780, as listed in official Medicare / NPI Registry data.
- What is Gregory Nacopoulos's NPI number?
- 1407953987. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Nacopoulos works
Medicare's Facility Affiliation Data lists Gregory Nacopoulos at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Roseland Community HospitalChicago, IL · Acute Care Hospital · CCN 140068
- Thorek Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140115
Practice locations
Addresses where Gregory Nacopoulos is enrolled with Medicare (CMS data updated 2026-10-02).
- 850 W Irving Park RdChicago, IL 60613 (773) 525‑6780
Group practices
Medicare enrollment lists Gregory Nacopoulos as a member of this group (CMS data updated 2026-10-02).
- Thorek Memorial Hospital50 clinicians in the group
Specialties
- General Surgeryprimary
- Vascular Surgeryalso
Other general surgeons in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407953987 |
| 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