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Infectious Disease

Jonathan A. Martinez Feshold, MD

Works at hospitals in San Juan, PR · Puerto Rico

Summary

Dr. Jonathan A. Martinez Feshold, MD is an infectious disease doctor at 32 Calle Ceramica, G5, Las Piedras, PR 00771. Phone: (787) 765-0521. Accepts Medicare assignment. NPI 1851749964. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Infectious disease doctor (Medicare lists Infectious Disease)
  • Address: 32 Calle Ceramica, G5, Las Piedras, PR 00771 · Directions (2 more locations)
  • Phone: (787) 765‑0521
  • Medicare: Accepts Medicare assignment
  • Hospital: Hospital San Francisco
  • Medical school: graduated 2016 (10 years since medical school)
  • Gender (as listed): Male
Call(787) 765‑0521 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Jonathan A. Martinez Feshold, 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 Jonathan A. Martinez Feshold accept Medicare assignment?
Yes. Medicare's clinician data says Jonathan A. Martinez Feshold 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 Jonathan A. Martinez Feshold's NPI number?
1851749964. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Jonathan A. Martinez Feshold works

Medicare's Facility Affiliation Data lists Jonathan A. Martinez Feshold 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 Jonathan A. Martinez Feshold is enrolled with Medicare (CMS data updated October 2, 2026).

  • 32 Calle Ceramica, G5Las Piedras, PR 00771
  • 900 Calle Hardvard, University GardensSan Juan, PR 00927
  • Carr 21 Bo Monacillos, Area Centro MedicoSan Juan, PR 00936 (787) 765‑0521

Specialties

Find other Infectious Disease doctors in Puerto Rico →

Other infectious disease doctors in Puerto Rico

Clinicians with the same Medicare primary specialty in Puerto Rico — not a recommendation.

All infectious disease doctors in Puerto Rico →

Clinician information

CredentialMD
Graduation year2016 (10 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1851749964
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