Quick answers
- Which hospitals does Alejandro Mendez Castillo work at?
- Medicare's official clinician data lists Alejandro Mendez Castillo at 5 hospitals: Barnes Jewish Hospital, Blessing Hospital, Madison Medical Center, Parkland Health Center and Parkland Health Center - Bonne Terre. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alejandro Mendez Castillo see patients?
- Medicare's clinician data lists 11 practice locations, including Hannibal, MO, Quincy, IL and Saint Louis, MO. Call before your visit to confirm the address.
- What is Alejandro Mendez Castillo's specialty?
- Medicare lists Interventional Radiology as the primary specialty.
- Does Alejandro Mendez Castillo accept Medicare assignment?
- Yes. Medicare's clinician data says Alejandro Mendez Castillo 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 Alejandro Mendez Castillo?
- (217) 223-8400, as listed in official Medicare / NPI Registry data.
- What is Alejandro Mendez Castillo's NPI number?
- 1649255076. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alejandro Mendez Castillo works
Medicare's Facility Affiliation Data lists Alejandro Mendez Castillo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · CCN 260032
- Blessing HospitalQuincy, IL · Acute Care Hospital · CCN 140015
- Madison Medical CenterFredericktown, MO · Critical Access Hospital · CCN 261302
- Parkland Health CenterFarmington, MO · Acute Care Hospital · CCN 260163
- Parkland Health Center - Bonne TerreBonne Terre, MO · Rural Emergency Hospital · CCN 260779
Practice locations
Addresses where Alejandro Mendez Castillo is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 11; the Medicare profile lists all.
- 100 Medical DrHannibal, MO 63401 (217) 223‑8400
- 1005 Broadway StQuincy, IL 62301 (309) 671‑8282
- 10101 Woodfield LnSaint Louis, MO 63132 (608) 280‑4647
- 1101 W Liberty StFarmington, MO 63640 (573) 756‑6451
- 1201 S Grand BlvdSaint Louis, MO 63104 (314) 617‑2000
Group practices
Medicare enrollment lists Alejandro Mendez Castillo as a member of these groups (CMS data updated 2026-10-02).
- SSM Health Care Group940 clinicians in the group
- Blessing Hospital421 clinicians in the group
- Specialists in Medical Imaging SC234 clinicians in the group
- Interventional Pain Institute, LLC9 clinicians in the group
- Nrg-Parkland LLC4 clinicians in the group
Specialties
- Interventional Radiologyprimary
Other interventional radiologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649255076 |
| 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