Quick answers
- Which hospitals does Gregory Siegel work at?
- Medicare's official clinician data lists Gregory Siegel at 1 hospital: OSF Saint Anthony's Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Siegel see patients?
- Medicare's clinician data lists 1 practice location in Alton, IL. Call before your visit to confirm the address.
- What is Gregory Siegel's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Gregory Siegel accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Siegel 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 Siegel?
- (618) 465-2571, as listed in official Medicare / NPI Registry data.
- What is Gregory Siegel's NPI number?
- 1740675594. 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 Siegel works
Medicare's Facility Affiliation Data lists Gregory Siegel at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OSF Saint Anthony's Health CenterAlton, IL · Acute Care Hospital · CCN 140052
Practice locations
Addresses where Gregory Siegel is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Saint Anthonys WayAlton, IL 62002 (618) 465‑2571
Group practices
Medicare enrollment lists Gregory Siegel as a member of this group (CMS data updated 2026-10-02).
- Alton-Griffin Emergency Group PC18 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Alton
Clinicians with the same Medicare primary specialty in Alton, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Connecticut School Of Medicine |
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740675594 |
| 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