Quick answers
- Which hospitals does George J. Sianis work at?
- Medicare's official clinician data lists George J. Sianis at 3 hospitals: Northshore University Healthsystem - Evanston Hospital, Northwest Community Hospital 1 and Swedish Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does George J. Sianis see patients?
- Medicare's clinician data lists 1 practice location in Chicago, IL. Call before your visit to confirm the address.
- What is George J. Sianis's specialty?
- Medicare lists General Practice as the primary specialty, and also General Surgery.
- Does George J. Sianis accept Medicare assignment?
- Yes. Medicare's clinician data says George J. Sianis 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 George J. Sianis?
- (773) 478-5600, as listed in official Medicare / NPI Registry data.
- What is George J. Sianis's NPI number?
- 1255366191. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where George J. Sianis works
Medicare's Facility Affiliation Data lists George J. Sianis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · CCN 140010
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · CCN 140252
- Swedish HospitalChicago, IL · Acute Care Hospital · CCN 140114
Practice locations
Addresses where George J. Sianis is enrolled with Medicare (CMS data updated 2026-10-02).
- 4921 N Western AveChicago, IL 60625 (773) 478‑5600
Specialties
- General Practiceprimary
- General Surgeryalso
Other general practitioners in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1973 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255366191 |
| 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