Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Español Near me My list Help
US Patient GuideUSA
Surprise me
General Practice

Guillermo A. Pagan Calo, MD

Works at hospitals in Mayaguez, PR · Puerto Rico

Summary

Dr. Guillermo A. Pagan Calo, MD is a general practitioner at Constacia Plaza, Hormigueros, PR 00660. Phone: (787) 849-3845. Accepts Medicare assignment. NPI 1891821815. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: General practitioner (Medicare lists General Practice)
  • Address: Constacia Plaza, Hormigueros, PR 00660 · Directions (1 more location)
  • Phone: (787) 849‑3845
  • Medicare: Accepts Medicare assignment
  • Hospital: Bella Vista Hospital
  • Medical school: graduated 2000 (26 years since medical school)
  • Gender (as listed): Male
Call(787) 849‑3845 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Guillermo A. Pagan Calo, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Guillermo A. Pagan Calo accept Medicare assignment?
Yes. Medicare's clinician data says Guillermo A. Pagan Calo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
What is Guillermo A. Pagan Calo's NPI number?
1891821815. 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 A. Pagan Calo works

Medicare's Facility Affiliation Data lists Guillermo A. Pagan Calo at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Guillermo A. Pagan Calo is enrolled with Medicare (CMS data updated October 2, 2026).

  • Constacia PlazaHormigueros, PR 00660
  • Constancia Plaza, 103b Carr 2 Km 166.4 Bo LavaderoHormigueros, PR 00660 (787) 849‑3845

Specialties

Find other General Practice doctors in Puerto Rico →

Other general practitioners in Hormigueros

Clinicians with the same Medicare primary specialty in Hormigueros, PR — not a recommendation.

All general practitioners in Hormigueros →

Clinician information

CredentialMD
Graduation year2000 (26 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1891821815
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians