Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Rosa Alexandra Lozada Sierra, MD

Individual provider Cornea and External Diseases Specialist Physician · NPI 1154707206

Rosa Alexandra Lozada Sierra, MD practises Ophthalmology in San Juan, Puerto Rico. Graduated from University of Puerto Rico School of Medicine in 2020, 6 years ago. Practices as a sole proprietor and works from 2 locations. Licensed in Puerto Rico.

Years since qualifying
6
Trained at
University of Puerto Rico School of Medicine
Licensed in
PR
In the registry since
2015
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address may be wrong

The ZIP code does not match the city and state on this record. Call before visiting.

239 Ave Arterial Hostos Ste 306
San Juan, PR 00918-1475
Phone: (787) 250-1746

No coordinates on file. Search this address in Google Maps

Additional practice locations (1)

  • 708 Ave Ponce De Leon Ste 202, San Juan, PR 00918-4520 — (787) 250-0812

Specialties & licences

Cornea and External Diseases Specialist Physician (primary) Taxonomy 207WX0120X · Licence 19445 (PR)

Record details

NPI number1154707206
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 30, 2015
Last updated in NPPESNovember 10, 2021
Certification dateNovember 10, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF PUERTO RICO SCHOOL OF MEDICINE
Graduated 2020 (6 years in practice)
Accepts Medicare assignment Not indicated

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Cataract surgery 79 times · 71st percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients47
Services billed 174 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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