Quick answers
- Which hospitals does Silvia C. Sy work at?
- Medicare's official clinician data lists Silvia C. Sy at 3 hospitals: Doctors Hosptal at Renaissance, Mission Regional Medical Center and Rio Grande Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Silvia C. Sy see patients?
- Medicare's clinician data lists 1 practice location in Mission, TX. Call before your visit to confirm the address.
- What is Silvia C. Sy's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Silvia C. Sy accept Medicare assignment?
- Yes. Medicare's clinician data says Silvia C. Sy 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 Silvia C. Sy?
- (956) 424-1511, as listed in official Medicare / NPI Registry data.
- What is Silvia C. Sy's NPI number?
- 1245284801. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Silvia C. Sy works
Medicare's Facility Affiliation Data lists Silvia C. Sy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Doctors Hosptal at RenaissanceEdinburg, TX · Acute Care Hospital · CCN 450869
- Mission Regional Medical CenterMission, TX · Acute Care Hospital · CCN 450176
- Rio Grande Regional HospitalMcAllen, TX · Acute Care Hospital · CCN 450711
Practice locations
Addresses where Silvia C. Sy is enrolled with Medicare (CMS data updated 2026-10-02).
- 910 S Bryan Rd, Suite 209Mission, TX 78572 (956) 424‑1511
Group practices
Medicare enrollment lists Silvia C. Sy as a member of this group (CMS data updated 2026-10-02).
- Silvia Castillo Sy Mdpa3 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245284801 |
| 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