Efren Rivera Santiago, MD
General Practice Physician · Fajardo, PR
Efren Rivera Santiago, MD is a general practice physician with a practice address in Fajardo, Puerto Rico, and NPI 1619138344, issued on Jun 25, 2008. Check the license (Puerto Rico 17155, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Efren Rivera Santiago
- Credential
- MD
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 17155 PR
Self-reported in NPPES; status is on the state search - Practice location
- F4 Ave Principal, Fajardo, PR 00738
- Phone
- (787) 860-5002
- Enumerated
- Jun 25, 2008
- Record last updated
- Apr 3, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (787) 655-9021
- Medicare enrollment
- Enrolled (PECOS I20140423001879); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 4,170 in Puerto Rico → Look up another NPI →
Verify Efren Rivera Santiago in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Puerto Rico board licenses this profession
Search for license 17155Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% more Medicare Part D claims than the average general practice physician in 2024
5,323 Medicare Part D claims for 243 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 44 claims were for opioids.
Most prescribed
- Atorvastatin Calcium443 claims
- Losartan Potassium277 claims
- Famotidine189 claims
- Gabapentin175 claims
- Amlodipine Besylate154 claims
- Levothyroxine Sodium148 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Efren Rivera Santiago among 4,170 general practice physician records in Puerto Rico
Efren Rivera Santiago, MD is one of 4,170 general practice physician records with a practice address in Puerto Rico. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 49% of them.
- NPI issued2008 · 49% of these records are older, 47% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated2006 · median 2004 among the 1,228 with a school on file
- Record last updated2019 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 general practice physician records list a practice address in Fajardo
They are 42 of the 346 NPPES records with a practice address in Fajardo, and 4,170 general practice physician records in Puerto Rico.
All 4,170 in Puerto Rico → Every provider in Fajardo → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Julio Concepcion, MDFajardo, PR 007381447291380
- Awilda Franco-Matta, MDFajardo, PR 007381649362690
- Carmen Irizarry Ceballos, MDFajardo, PR 007381356302202
- Jose Mendez Jiminian, MDFajardo, PR 007381730148750
- Sarita Montes, MDFajardo, PR 007381386696292
- Miguel Morales -Vales, M.D.Fajardo, PR 007381699794982
- Samuel Negron Agosto, M.D.Fajardo, PR 007381164525465
- Maria Perez, M.D.Fajardo, PR 007381396764056
Common questions
What is Efren Rivera Santiago, MD's NPI number?
Efren Rivera Santiago, MD's National Provider Identifier (NPI) is 1619138344, issued on Jun 25, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Efren Rivera Santiago, MD located?
The NPPES record lists a practice address at F4 Ave Principal, Fajardo, PR, 00738. Phone: (787) 860-5002. Providers update this record themselves, so call before visiting.
How can I verify Efren Rivera Santiago, MD's license?
NPPES lists Puerto Rico license number 17155, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Efren Rivera Santiago, MD prescribe under Medicare Part D?
In 2024, Efren Rivera Santiago, MD had 5,323 Medicare Part D claims for 243 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.