Elfren Martinez, M.D
Internal Medicine Physician · Aguas Buenas, PR
Elfren Martinez, M.D is an internal medicine physician with a practice address in Aguas Buenas, Puerto Rico, and NPI 1245204411, issued on Feb 15, 2006. Check the license (Puerto Rico 8300, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Elfren Martinez
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 8300 PR
Self-reported in NPPES; status is on the state search - Practice location
- 94 Calle Munoz Rivera, Aguas Buenas, PR 00703
- Phone
- (787) 732-0303
- Enumerated
- Feb 15, 2006
- Record last updated
- Sep 7, 2025
- Fax
- (787) 732-0303
- Medicare enrollment
- Enrolled (PECOS I20040529000082); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,146 in Puerto Rico → Look up another NPI →
Verify Elfren Martinez 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 8300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average internal medicine physician in 2024
3,948 Medicare Part D claims for 262 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Metformin Hcl177 claims
- Synthroid170 claims
- Rosuvastatin Calcium169 claims
- Atorvastatin Calcium163 claims
- Simvastatin147 claims
- Omeprazole144 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.
Elfren Martinez among 1,146 internal medicine physician records in Puerto Rico
Elfren Martinez, M.D is one of 1,146 internal medicine physician records with a practice address in Puerto Rico. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1983 · median 1996 among the 595 with a school on file
- Record last updated2025 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 internal medicine physician records list a practice address in Aguas Buenas
They are 3 of the 91 NPPES records with a practice address in Aguas Buenas, and 1,146 internal medicine physician records in Puerto Rico.
All 1,146 in Puerto Rico → Every provider in Aguas Buenas → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ana Perez Florit, M.D.Aguas Buenas, PR 007031760568463
- Roberto Velazquez-Correa, M.D.Aguas Buenas, PR 007031215162656
- Heidi Ayala Cardona, M.D.Aibonito, PR 007051417996919
- Luis Canas, MDAibonito, PR 007051790780914
- Carlos Cepero Ayende, M.D.Aibonito, PR 007051831179795
- Rafael De Leon-Borras, MDAibonito, PR 007051902160690
- Maria Echevarria Cardona, M.D.Aibonito, PR 007051902851611
- Victor Polanco Sanchez, M.D.Aibonito, PR 007051205849528
Common questions
What is Elfren Martinez, M.D's NPI number?
Elfren Martinez, M.D's National Provider Identifier (NPI) is 1245204411, issued on Feb 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Elfren Martinez, M.D located?
The NPPES record lists a practice address at 94 Calle Munoz Rivera, Aguas Buenas, PR, 00703. Phone: (787) 732-0303. Providers update this record themselves, so call before visiting.
How can I verify Elfren Martinez, M.D's license?
NPPES lists Puerto Rico license number 8300, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Elfren Martinez, M.D prescribe under Medicare Part D?
In 2024, Elfren Martinez, M.D had 3,948 Medicare Part D claims for 262 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.