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Addiction Medicine

Henry X. Nieves Diaz, MD

Works at hospitals in Caguas, PR · Puerto Rico

Summary

Dr. Henry X. Nieves Diaz, MD is an addiction medicine doctor at 100 Ave Luis Munoz Marin, Caguas, PR 00725. Phone: (787) 478-4377. May accept Medicare assignment. NPI 1588168850. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Addiction medicine doctor (Medicare lists Addiction Medicine)
  • Address: 100 Ave Luis Munoz Marin, Caguas, PR 00725 · Directions (1 more location)
  • Phone: (787) 478‑4377
  • Medicare: May accept Medicare assignment
  • Hospital: Hospital Pavia Caguas
  • Medical school: University Central Del Caribe Escuela De Medicina · graduated 2025 (1 years since medical school)
  • Gender (as listed): Male
Call(787) 478‑4377 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Henry X. Nieves Diaz, 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 Henry X. Nieves Diaz accept Medicare assignment?
Medicare's clinician data says Henry X. Nieves Diaz may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
What is Henry X. Nieves Diaz's NPI number?
1588168850. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Henry X. Nieves Diaz works

Medicare's Facility Affiliation Data lists Henry X. Nieves Diaz 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 Henry X. Nieves Diaz is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Addiction Medicine doctors in Puerto Rico →

Clinician information

CredentialMD
Medical schoolUniversity Central Del Caribe Escuela De Medicina
Graduation year2025 (1 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1588168850
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