Quick answers
- Which hospitals does Alexander D. Seger work at?
- Medicare's official clinician data lists Alexander D. Seger at 1 hospital: SSM Health St Mary's Hospital -Centralia. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alexander D. Seger see patients?
- Medicare's clinician data lists 1 practice location in Centralia, IL. Call before your visit to confirm the address.
- What is Alexander D. Seger's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Alexander D. Seger accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander D. Seger 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 Alexander D. Seger?
- (618) 532-6731, as listed in official Medicare / NPI Registry data.
- What is Alexander D. Seger's NPI number?
- 1457913279. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexander D. Seger works
Medicare's Facility Affiliation Data lists Alexander D. Seger at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- SSM Health St Mary's Hospital -CentraliaCentralia, IL · Acute Care Hospital · CCN 140034
Practice locations
Addresses where Alexander D. Seger is enrolled with Medicare (CMS data updated 2026-10-02).
- 400 N Pleasant AveCentralia, IL 62801 (618) 532‑6731
Group practices
Medicare enrollment lists Alexander D. Seger as a member of this group (CMS data updated 2026-10-02).
- Physician Services Corporation of Southern Illinois Inc120 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Centralia
Clinicians with the same Medicare primary specialty in Centralia, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Creighton University School Of Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457913279 |
| 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