Quick answers
- Which hospitals does Marie E. Castillo Alcasid work at?
- Medicare's official clinician data lists Marie E. Castillo Alcasid at 1 hospital: Oswego Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marie E. Castillo Alcasid see patients?
- Medicare's clinician data lists 1 practice location in Oswego, NY. Call before your visit to confirm the address.
- What is Marie E. Castillo Alcasid's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Marie E. Castillo Alcasid accept Medicare assignment?
- Yes. Medicare's clinician data says Marie E. Castillo Alcasid 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 Marie E. Castillo Alcasid?
- (315) 349-5511, as listed in official Medicare / NPI Registry data.
- What is Marie E. Castillo Alcasid's NPI number?
- 1124135025. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marie E. Castillo Alcasid works
Medicare's Facility Affiliation Data lists Marie E. Castillo Alcasid at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Oswego HospitalOswego, NY · Acute Care Hospital · CCN 330218
Practice locations
Addresses where Marie E. Castillo Alcasid is enrolled with Medicare (CMS data updated 2026-10-02).
- 110 W 6th StOswego, NY 13126 (315) 349‑5511
Group practices
Medicare enrollment lists Marie E. Castillo Alcasid as a member of this group (CMS data updated 2026-10-02).
- Oswego Hospital60 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Oswego
Clinicians with the same Medicare primary specialty in Oswego, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124135025 |
| 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