Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Milliette Alvarado-Santiago, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1821306127

Milliette Alvarado-Santiago, MD practises Endocrinology in Rio Piedras, Puerto Rico. Graduated from University of Puerto Rico School of Medicine in 2010, 16 years ago. Practices with Recinto De Ciencias Medicas, a 248-clinician group and accepts Medicare assignment. Licensed in Puerto Rico.

Years since qualifying
16
Trained at
University of Puerto Rico School of Medicine
Licensed in
PR
In the registry since
2010
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address may be wrong

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

Clinica De La Escuela De Medicina Reparto Metropolitano Shopping Ave Americo Miranda
Rio Piedras, PR 00921 Not confirmed with CMS for 11 years — call before visiting
Phone: (787) 758-7908
Fax: (787) 625-1966

No coordinates on file. Search this address in Google Maps

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 20554 (PR)

Record details

NPI number1821306127
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 21, 2010
Last updated in NPPESAugust 6, 2015

Medicare enrollment

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

Medicare specialtyENDOCRINOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF PUERTO RICO SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Recinto De Ciencias Medicas — 248 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients16
Services billed 27 a service is one billed item, such as a visit, a test or a procedure
Average patient age66

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $20,650 21 payments
Honoraria $7,465 2 payments
Food and Beverage $1,590 38 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $1,572 4 payments · travel or lodging paid or reimbursed, such as to attend a conference

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Hospital Upr, Dr Federico Trilla Hospital · Carolina, PR

Colleagues at Recinto De Ciencias Medicas

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 248 clinicians in the practice; 12 are shown here.

Other providers in Rio Piedras