Quick answers
- Which hospitals does Alexander T. Ryan work at?
- Medicare's official clinician data lists Alexander T. Ryan at 5 hospitals: Ascension Saint Thomas Hospital, Ascension St John Medical Center, Decatur Morgan Hospital - Decatur Campus, Research Medical Center and St Joseph's Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alexander T. Ryan see patients?
- Medicare's clinician data lists 8 practice locations, including Hannibal, MO, Linton, IN and Shiloh, IL. Call before your visit to confirm the address.
- What is Alexander T. Ryan's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Alexander T. Ryan accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander T. Ryan 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 T. Ryan?
- (573) 221-5250, as listed in official Medicare / NPI Registry data.
- What is Alexander T. Ryan's NPI number?
- 1912232422. 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 T. Ryan works
Medicare's Facility Affiliation Data lists Alexander T. Ryan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Saint Thomas HospitalNashville, TN · Acute Care Hospital · CCN 440082
- Ascension St John Medical CenterTulsa, OK · Acute Care Hospital · CCN 370114
- Decatur Morgan Hospital - Decatur CampusDecatur, AL · Acute Care Hospital · CCN 010085
- Research Medical CenterKansas City, MO · Acute Care Hospital · CCN 260027
- St Joseph's HospitalTucson, AZ · Acute Care Hospital · CCN 030011
Practice locations
Addresses where Alexander T. Ryan is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 100 Medical DrHannibal, MO 63401 (573) 221‑5250
- 1185 N 1000, Greene County General HospitalLinton, IN 47441 (812) 847‑5212
- 1404 Cross StShiloh, IL 62269 (217) 726‑8096
- 300 Health Way DrPotosi, MO 63664 (573) 438‑5451
- 3050 Montvale Dr, Suite ASpringfield, IL 62704 (217) 726‑8096
Group practices
Medicare enrollment lists Alexander T. Ryan as a member of these groups (CMS data updated 2026-10-02).
- Peterson Medical Associates191 clinicians in the group
- ER Physician Group at Jackson Hospital154 clinicians in the group
- Clinical Radiologists SC29 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Hannibal
Clinicians with the same Medicare primary specialty in Hannibal, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Pittsburgh School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912232422 |
| 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