Quick answers
- Which hospitals does Ahsan Usman work at?
- Medicare's official clinician data lists Ahsan Usman at 5 hospitals: Gateway Regional Medical Center, HSHS St Elizabeth's Hospital, Memorial Hospital, SSM Health St Mary's Hospital - St Louis and SSM Health St Mary's Hospital -Centralia. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ahsan Usman see patients?
- Medicare's clinician data lists 12 practice locations, including Alton, IL, O Fallon, IL and Pekin, IL. Call before your visit to confirm the address.
- What is Ahsan Usman's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Ahsan Usman accept Medicare assignment?
- Yes. Medicare's clinician data says Ahsan Usman 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 Ahsan Usman?
- (618) 465-2571, as listed in official Medicare / NPI Registry data.
- What is Ahsan Usman's NPI number?
- 1215016571. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ahsan Usman works
Medicare's Facility Affiliation Data lists Ahsan Usman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Gateway Regional Medical CenterGranite City, IL · Acute Care Hospital · CCN 140125
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · CCN 140187
- Memorial HospitalBelleville, IL · Acute Care Hospital · CCN 140185
- SSM Health St Mary's Hospital - St LouisSaint Louis, MO · Acute Care Hospital · CCN 260091
- SSM Health St Mary's Hospital -CentraliaCentralia, IL · Acute Care Hospital · CCN 140034
Practice locations
Addresses where Ahsan Usman is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 12; the Medicare profile lists all.
- 1 Saint Anthonys WayAlton, IL 62002 (618) 465‑2571
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
- 1021 Court St, Suite BPekin, IL 61554 (309) 642‑6705
- 1201 S Grand BlvdSaint Louis, MO 63104 (314) 617‑2000
- 129 N 8th StE Saint Louis, IL 62201 (618) 274‑1900
Group practices
Medicare enrollment lists Ahsan Usman as a member of these groups (CMS data updated 2026-10-02).
- SSM Health Care Group940 clinicians in the group
- Cep America-Illinois Hospitalists, LLP196 clinicians in the group
- Rashid a Dalal MD PC4 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Alton
Clinicians with the same Medicare primary specialty in Alton, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215016571 |
| 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