Quick answers
- Which hospitals does Theodore J. Gleason work at?
- Medicare's official clinician data lists Theodore J. Gleason at 5 hospitals: Anderson Hospital, HSHS St Elizabeth's Hospital, St Johns Hospital, St Josephs Hospital and St Marys Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Theodore J. Gleason see patients?
- Medicare's clinician data lists 16 practice locations, including O Fallon, IL, Litchfield, IL and Highland, IL. Call before your visit to confirm the address.
- What is Theodore J. Gleason's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Theodore J. Gleason accept Medicare assignment?
- Yes. Medicare's clinician data says Theodore J. Gleason 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 Theodore J. Gleason?
- (618) 234-2120, as listed in official Medicare / NPI Registry data.
- What is Theodore J. Gleason's NPI number?
- 1295848216. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Theodore J. Gleason works
Medicare's Facility Affiliation Data lists Theodore J. Gleason at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Anderson HospitalMaryville, IL · Acute Care Hospital · CCN 140289
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · CCN 140187
- St Johns HospitalSpringfield, IL · Acute Care Hospital · CCN 140053
- St Josephs HospitalBreese, IL · Acute Care Hospital · CCN 140145
- St Marys HospitalDecatur, IL · Acute Care Hospital · CCN 140166
Practice locations
Addresses where Theodore J. Gleason is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 16; the Medicare profile lists all.
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
- 1215 Franciscan DrLitchfield, IL 62056 (217) 324‑2191
- 12866 Troxler AveHighland, IL 62249 (309) 740‑4272
- 1512 N Green Mount RdO Fallon, IL 62269 (618) 234‑2120
- 1800 E Lake Shore DrDecatur, IL 62521 (309) 740‑4272
Group practices
Medicare enrollment lists Theodore J. Gleason as a member of this group (CMS data updated 2026-10-02).
- Central Illinois Radiological Associates Ltd209 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in O Fallon
Clinicians with the same Medicare primary specialty in O Fallon, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1295848216 |
| 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