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

Endocrinology

Yanira Marrero McFaline, MD

Works at hospitals in San Juan, PR · Puerto Rico

Summary

Dr. Yanira Marrero McFaline, MD is an endocrinologist at 1 ER Piso Centro Medico, Edif Decanato De Farmacia, Rio Piedras, PR 00936. Phone: (787) 773-8283. Accepts Medicare assignment. In 2024, Yanira Marrero McFaline had 88 Original Medicare patients and 188 services. NPI 1801098330. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Endocrinologist (Medicare lists Endocrinology)
  • Address: 1 ER Piso Centro Medico, Edif Decanato De Farmacia, Rio Piedras, PR 00936 · Directions
  • Phone: (787) 773‑8283
  • Medicare: Accepts Medicare assignment
  • Hospital: Auxilio Mutuo Hospital
  • Group practice: Centro de Investigacion Educacion y Servicios Medicos Para la Diabetes
  • Medical school: University Of Puerto Rico School Of Medicine · graduated 2004 (22 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Yanira Marrero McFaline, 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 Yanira Marrero McFaline accept Medicare assignment?
Yes. Medicare's clinician data says Yanira Marrero McFaline 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.
How many Medicare patients does Yanira Marrero McFaline see?
In 2024, CMS data shows 88 Original Medicare patients and 188 services for Yanira Marrero McFaline. This counts Original Medicare only and measures volume, not quality.
What is Yanira Marrero McFaline's NPI number?
1801098330. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Yanira Marrero McFaline, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients88
Services billed to Medicare188
Different services or procedures9
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)124 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)28 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Diabetes65%
  • Arthritis42%
  • Osteoporosis35%
  • Chronic kidney disease33%

Hospitals where Yanira Marrero McFaline works

Medicare's Facility Affiliation Data lists Yanira Marrero McFaline 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 Yanira Marrero McFaline is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Yanira Marrero McFaline as a member of this group (CMS data updated October 2, 2026).

  • Centro de Investigacion Educacion y Servicios Medicos Para la Diabetes7 clinicians in the group

Specialties

Find other Endocrinology doctors in Puerto Rico →

Other endocrinologists in Rio Piedras

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

All endocrinologists in Rio Piedras →

Other clinicians in Centro de Investigacion Educacion y Servicios Medicos Para la Diabetes

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Puerto Rico School Of Medicine
Graduation year2004 (22 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1801098330
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. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians