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Internal Medicine

Antonio J. Santiago, MD

Sees patients in Cidra, PR · Puerto Rico

Summary

Dr. Antonio J. Santiago, MD is an internal medicine doctor at PO Box, Suite 1650, Cidra, PR 00739. May accept Medicare assignment. NPI 1437799004. Source: CMS National Downloadable File, updated October 2, 2026.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: PO Box, Suite 1650, Cidra, PR 00739 · Directions
  • Medicare: May accept Medicare assignment
  • Medical school: graduated 2025 (1 years since medical school)
  • Gender (as listed): Male
NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Antonio J. Santiago, 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 Antonio J. Santiago accept Medicare assignment?
Medicare's clinician data says Antonio J. Santiago may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
What is Antonio J. Santiago's NPI number?
1437799004. 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 Antonio J. Santiago is enrolled with Medicare (CMS data updated October 2, 2026).

  • PO Box, Suite 1650Cidra, PR 00739

Specialties

Find other Internal Medicine doctors in Puerto Rico →

Other internal medicine doctors in Cidra

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

All internal medicine doctors in Cidra →

Clinician information

CredentialMD
Graduation year2025 (1 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1437799004
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