Dr. Efren Rivera Santiago, MD
- Medicare services, 2018
- 57
- Part D claims, 2024
- 5,323
- Industry payments
- $506
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- F5 Calle Principal, Fajardo, PR 00738
- Practice phone
- Call (787) 860-5002
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Costa Este Medical Services - Fajardo
Primary care practice · Fajardo, Puerto Rico
Find Dr. Rivera Santiago's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Efren Rivera Santiago is a general practice physician in San Juan, Puerto Rico
Dr. Rivera Santiago practices at Costa Este Medical Services - Fajardo in Fajardo, Puerto Rico.
Dr. Rivera Santiago's NPI, 1619138344, was assigned on June 25, 2008. Dr. Rivera Santiago holds Puerto Rico license 17155.
- NPI
- 1619138344NPI Registry (opens in a new tab)
- NPI enumeration date
- June 25, 2008
- NPI status
- Active
- Practice phone
- (787) 860-5002
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Efren Rivera Santiago practices in Fajardo and San Juan
Dr. Rivera Santiago's primary practice is Costa Este Medical Services - Fajardo, at F5 Calle Principal, Fajardo, PR 00738. The practice phone is (787) 860-5002. The NPI Registry lists Dr. Rivera Santiago's practice address as 516 Cll Juan J Jimenez, San Juan, PR 00918.
- Costa Este Medical Services - FajardoPrimaryF5 Calle Principal, Fajardo, PR 00738Phone(787) 860-5002
- NPI Registry address516 Cll Juan J Jimenez, San Juan, PR 00918 · San Juan CountyPhone(787) 860-5002
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Efren Rivera Santiago is affiliated with 2 sites of care and 1 medical group
Dr. Rivera Santiago's primary practice is Costa Este Medical Services - Fajardo in Fajardo, Puerto Rico. The medical group on file is Costa Este Medical Services. Dmand AI also links Dr. Rivera Santiago to 1 more physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Efren Rivera Santiago's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rivera Santiago practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Costa Este Medical Services - Fajardo | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Efren Rivera Santiago is one of 2,604 general practice physicians in Puerto Rico
General practice is Dr. Rivera Santiago's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Rivera Santiago is licensed in Puerto Rico.
Specialties and state licenses
- General practice, Puerto RicoPrimary
General practice physicians near Dr. Rivera Santiago
Counts of general practice physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Efren Rivera Santiago billed Medicare for 57 services in 2018
CMS data shows 57 Medicare services from Dr. Rivera Santiago across 1 procedure code in 2018, all of them office visits. Medicare paid $2,479 for them. Every service was in an office.
Dr. Rivera Santiago's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 622018: 578%
Dr. Rivera Santiago compared with the Puerto Rico median for general practice physicians, 2018
- Dr. Rivera Santiago
- Puerto Rico median
- Medicare services
- 57vs 3468% above
- Part D claims
- 4,746vs 7356.5 times
Medians across 3,001 general practice physicians in Puerto Rico with Dmand AI profiles that report each measure.
Dr. Rivera Santiago's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Efren Rivera Santiago's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Rivera Santiago's median patient age at 71, with 50% women.
Dr. Rivera Santiago's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Efren Rivera Santiago wrote 5,323 Medicare Part D claims in 2024
In 2024, Dr. Rivera Santiago wrote 5,323 Medicare Part D claims for 243 patients. 90% of them were for generic drugs. CMS names the drug for 4,746 of them, across 103 drugs with 11 or more claims each, at $189,887 in total drug cost. In 2023, CMS named 4,841 claims across 103 drugs.
Dr. Rivera Santiago's Part D claims by kind of drug, 2024
- Generic4,772 claims90%
- Brand-name540 claims10%
- Other11 claims0%
Dr. Rivera Santiago's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Rivera Santiago's Part D claims, 2024
- Opioids1%44 of 5,323 claims
- Antibiotics1%71 of 5,323 claims
- Antipsychotics, patients 65 and over1%58 of 5,323 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,8412024: 4,7462%
Drugs named by CMS: 103 in 2024, 103 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Efren Rivera Santiago received $506 in industry payments from 2016 to 2021
CMS Open Payments shows 26 general payments to Dr. Rivera Santiago from 4 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 98% of the total. AstraZeneca Pharmaceuticals LP paid the most, $268.
General payments to Dr. Rivera Santiago by program year, 2016 to 2021
General payments to Dr. Rivera Santiago by kind, 2016 to 2021
- Food and beverage$49698%
- Education$112%
Companies that paid Dr. Rivera Santiago the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Efren Rivera Santiago's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Efren Rivera Santiago
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What is Dr. Efren Rivera Santiago's NPI number?
Dr. Efren Rivera Santiago's NPI number is 1619138344. It was assigned on June 25, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Efren Rivera Santiago?
Dr. Efren Rivera Santiago is a general practice physician in San Juan, Puerto Rico. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Efren Rivera Santiago practice?
Dr. Rivera Santiago practices at F5 Calle Principal, Fajardo, PR 00738. Dr. Rivera Santiago also practices at 516 Cll Juan J Jimenez, San Juan, PR 00918. Dr. Rivera Santiago's primary practice is Costa Este Medical Services - Fajardo in Fajardo, Puerto Rico. Dmand AI also links Dr. Rivera Santiago to 1 physician office.
What is Dr. Efren Rivera Santiago's office phone number?
The practice phone on file for Dr. Rivera Santiago is (787) 860-5002.
What is Dr. Efren Rivera Santiago's medical license number?
Dr. Rivera Santiago holds Puerto Rico license 17155.
What medical group is Dr. Efren Rivera Santiago part of?
Dr. Rivera Santiago is linked to Costa Este Medical Services.
Does Dr. Efren Rivera Santiago accept Medicare?
Yes. CMS data shows Dr. Rivera Santiago billed Medicare for 57 services in 2018.
What services does Dr. Efren Rivera Santiago bill to Medicare?
In 2018, Dr. Rivera Santiago's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Efren Rivera Santiago prescribe most?
In 2024 Medicare Part D data, Dr. Rivera Santiago's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Famotidine.
Has Dr. Efren Rivera Santiago received payments from drug or device companies?
CMS Open Payments shows $506 in general payments to Dr. Rivera Santiago from 4 companies from 2016 to 2021. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Efren Rivera Santiago been practicing?
Dr. Rivera Santiago graduated from medical school in 2006, 20 years ago.
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