Quick answers
- Which hospitals does Guillermo Alvarez work at?
- Medicare's official clinician data lists Guillermo Alvarez at 2 hospitals: Hospital San Carlos Borromeo and Mayaguez Medical Center Dr Ramon Emeterio Betances…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Guillermo Alvarez see patients?
- Medicare's clinician data lists 1 practice location in Aguadilla, PR. Call before your visit to confirm the address.
- What is Guillermo Alvarez's specialty?
- Medicare lists General Practice as the primary specialty.
- Does Guillermo Alvarez accept Medicare assignment?
- Yes. Medicare's clinician data says Guillermo Alvarez 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 Guillermo Alvarez?
- (939) 969-4277, as listed in official Medicare / NPI Registry data.
- What is Guillermo Alvarez's NPI number?
- 1063820355. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Guillermo Alvarez works
Medicare's Facility Affiliation Data lists Guillermo Alvarez at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hospital San Carlos BorromeoMoca, PR · Acute Care Hospital · CCN 400111
- Mayaguez Medical Center Dr Ramon Emeterio Betances…Mayaguez, PR · Acute Care Hospital · CCN 400103
Practice locations
Addresses where Guillermo Alvarez is enrolled with Medicare (CMS data updated 2026-10-02).
- Km2 Carr, Suite 467Aguadilla, PR 00603 (939) 969‑4277
Specialties
- General Practiceprimary
Other general practitioners in Aguadilla
Clinicians with the same Medicare primary specialty in Aguadilla, PR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063820355 |
| 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