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General Practice

Nancy Marrero Viera, MD

Sees patients in Hatillo, PR · Puerto Rico

Summary

Dr. Nancy Marrero Viera, MD is a general practitioner at Carr 490 Km 3, Hatillo, PR 00659. Phone: (787) 820-8082. Accepts Medicare assignment. NPI 1134370091. Source: CMS National Downloadable File, updated October 2, 2026.

  • Specialty: General practitioner (Medicare lists General Practice)
  • Address: Carr 490 Km 3, Hatillo, PR 00659 · Directions
  • Phone: (787) 820‑8082
  • Medicare: Accepts Medicare assignment
  • Medical school: graduated 2007 (19 years since medical school)
  • Gender (as listed): Female
Call(787) 820‑8082 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Nancy Marrero Viera, 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 Nancy Marrero Viera accept Medicare assignment?
Yes. Medicare's clinician data says Nancy Marrero Viera 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 Nancy Marrero Viera's NPI number?
1134370091. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Nancy Marrero Viera is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other General Practice doctors in Puerto Rico →

Other general practitioners in Hatillo

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

All general practitioners in Hatillo →

Clinician information

CredentialMD
Graduation year2007 (19 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1134370091
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians