Elfren Rios Santiago, M.D.
NPI 1336124627 · Family Medicine Physician · Dorado, PR
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elfren Rios Santiago, M.D. is a Family Medicine Physician provider in Dorado, PR (NPI 1336124627).
Provider details
- NPI number
- 1336124627
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 7399 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
63 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 63 | $58 |
Typical Medicare-allowed amounts for these services range $58–$58 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodiumbrand: Synthroid | 101 | 22 |
| Lisinopril | 60 | — |
| Amlodipine Besylate | 52 | 15 |
| Losartan Potassium | 49 | 18 |
| Simvastatin | 48 | 11 |
| Azithromycin | 44 | 40 |
| Atorvastatin Calcium | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$250 across 2 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
- 2005-12-09
- Last updated
- 2010-11-01
Frequently asked questions
- What is Elfren Rios Santiago's NPI number?
- Elfren Rios Santiago's National Provider Identifier (NPI) is 1336124627, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elfren Rios Santiago's specialty?
- Elfren Rios Santiago is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Elfren Rios Santiago located?
- Elfren Rios Santiago's practice location on file with NPPES is Mendez Vigo #275, Dorado, PR 00646-4904.
- What is Elfren Rios Santiago's phone number?
- The practice phone number listed in the NPPES registry for Elfren Rios Santiago is (787) 796-6154.
- Does Elfren Rios Santiago accept Medicare?
- Elfren Rios Santiago is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elfren Rios Santiago's NPI active?
- Yes — Elfren Rios Santiago's NPI (1336124627) is active in the NPPES registry as of the last update on 2010-11-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.