Yolanda Mas De Leon, M.D.
Internal Medicine Physician · Fajardo, PR
Yolanda Mas De Leon, M.D. is an internal medicine physician with a practice address in Fajardo, Puerto Rico, and NPI 1952372880, issued on Jan 30, 2006. Check the license (Puerto Rico 6491, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Yolanda Mas De Leon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 6491 PR
Self-reported in NPPES; status is on the state search - Practice location
- 10 Calle Union, Fajardo, PR 00738
- Phone
- (787) 863-4886
- Enumerated
- Jan 30, 2006
- Record last updated
- Nov 10, 2022
- Fax
- (787) 860-5144
- Medicare enrollment
- Enrolled (PECOS I20120228000622); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,146 in Puerto Rico → Look up another NPI →
Verify Yolanda Mas De Leon 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 6491Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average internal medicine physician in 2024
14,403 Medicare Part D claims for 366 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 20 claims were for opioids.
Most prescribed
- Losartan Potassium1,206 claims
- Atorvastatin Calcium760 claims
- Synthroid549 claims
- Amlodipine Besylate548 claims
- Gabapentin511 claims
- Rosuvastatin Calcium499 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.
Yolanda Mas De Leon among 1,146 internal medicine physician records in Puerto Rico
Yolanda Mas De Leon, 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
- Graduated1976 · median 1996 among the 595 with a school on file
- Record last updated2022 · 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).
10 internal medicine physician records list a practice address in Fajardo
They are 10 of the 346 NPPES records with a practice address in Fajardo, and 1,146 internal medicine physician records in Puerto Rico.
All 1,146 in Puerto Rico → Every provider in Fajardo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jamil Abouelhossen, MDFajardo, PR 007381356347538
- Luis Arraut-Ramirez, M.D.Fajardo, PR 007381396738951
- Maria Encarnacion, MDFayardo, PR 007381750353017
- Carlos Fontanez, M.D.Fajardo, PR 007381255403010
- Iolani Garcia, M.D.Fajardo, PR 007381124273651
- Luisa Hernandez Liyim, M.D.Fajardo, PR 007381982697751
- Ramon Pastrana Maldonado, M.D.Fajardo, PR 007381811076813
- Jaime Rodriguez, M.D.Fajardo, PR 007381952372849
Common questions
What is Yolanda Mas De Leon, M.D.'s NPI number?
Yolanda Mas De Leon, M.D.'s National Provider Identifier (NPI) is 1952372880, issued on Jan 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yolanda Mas De Leon, M.D. located?
The NPPES record lists a practice address at 10 Calle Union, Fajardo, PR, 00738. Phone: (787) 863-4886. Providers update this record themselves, so call before visiting.
How can I verify Yolanda Mas De Leon, M.D.'s license?
NPPES lists Puerto Rico license number 6491, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Yolanda Mas De Leon, M.D. prescribe under Medicare Part D?
In 2024, Yolanda Mas De Leon, M.D. had 14,403 Medicare Part D claims for 366 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.