Milliette Alvarado-Santiago, M.D.
NPI 1821306127 · Endocrinology, Diabetes & Metabolism Physician · Rio Piedras, PR
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Milliette Alvarado-Santiago, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Rio Piedras, PR (NPI 1821306127).
Provider details
- NPI number
- 1821306127
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20554 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodiumbrand: Synthroid | 687 | 105 |
| Semaglutidebrand: Ozempic | 183 | 28 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus | 137 | 25 |
| Dulaglutidebrand: Trulicity | 132 | 23 |
| Rosuvastatin Calcium | 120 | 31 |
| Insulin Lisprobrand: Humalog | 104 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$37,852 across 102 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-09-21
- Last updated
- 2015-08-06
Frequently asked questions
- What is Milliette Alvarado-Santiago's NPI number?
- Milliette Alvarado-Santiago's National Provider Identifier (NPI) is 1821306127, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Milliette Alvarado-Santiago's specialty?
- Milliette Alvarado-Santiago is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Milliette Alvarado-Santiago located?
- Milliette Alvarado-Santiago's practice location on file with NPPES is Clinica De La Escuela De Medicina, Rio Piedras, PR 00921.
- What is Milliette Alvarado-Santiago's phone number?
- The practice phone number listed in the NPPES registry for Milliette Alvarado-Santiago is (787) 758-7908.
- Does Milliette Alvarado-Santiago accept Medicare?
- Milliette Alvarado-Santiago is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Milliette Alvarado-Santiago's NPI active?
- Yes — Milliette Alvarado-Santiago's NPI (1821306127) is active in the NPPES registry as of the last update on 2015-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.