Ernesto X. Marrero De Gracia, M.D.
Internal Medicine Physician · Bayamon, PR
Ernesto X. Marrero De Gracia, M.D. is an internal medicine physician with a practice address in Bayamon, Puerto Rico, and NPI 1295743367, issued on Aug 4, 2006. Check the license (Puerto Rico 15171, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ernesto X. Marrero De Gracia
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 15171 PR
Self-reported in NPPES; status is on the state search - Practice location
- Instituto San Pablo, Bayamon, PR 00961
- Phone
- (787) 740-2010
- Enumerated
- Aug 4, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (787) 740-8377
- Medicare enrollment
- Enrolled (PECOS I20060908000298); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,146 in Puerto Rico → Look up another NPI →
Also registered at Instituto San Pablo
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Justino Betancourt, M.D.Internal Medicine Physician1295735363
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- Jorge Cortes-Ruiz, M.D.Gastroenterology Physician1770586273
- Gilmarie Cumba Llavona, M.D.General Practice Physician1902854409
- Angel Hernandez Colon, M.D.Specialist1023012630
Verify Ernesto X. Marrero De Gracia 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 15171Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.8 times the Medicare Part D claims of the average internal medicine physician in 2024
12,051 Medicare Part D claims for 664 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 17 claims were for opioids.
Most prescribed
- Atorvastatin Calcium751 claims
- Gabapentin639 claims
- Losartan Potassium442 claims
- Metoprolol Succinate405 claims
- Metformin Hcl394 claims
- Levothyroxine Sodium389 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.
Industry payments in 2024: $64.53
3 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Physiotherapy Rehabilitation Services IncBayamon, PR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ernesto X. Marrero De Gracia among 1,146 internal medicine physician records in Puerto Rico
Ernesto X. Marrero De Gracia, 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
- Graduated2001 · median 1996 among the 595 with a school on file
- Record last updated2007 · 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).
117 internal medicine physician records list a practice address in Bayamon
They are 117 of the 2,958 NPPES records with a practice address in Bayamon, and 1,146 internal medicine physician records in Puerto Rico.
All 1,146 in Puerto Rico → Every provider in Bayamon → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lara Aponte Perez, M.D.Bayamon, PR 009611437154523
- Justino Betancourt, M.D.Bayamon, PR 009611295735363
- Pablo Bisono Rodriguez, M.D.Bayamon, PR 009611366412801
- Carlos Martinez Duran, MDBayamon, PR 009611700863420
- Mitchell Matundan, M.D.Bayamon, PR 009611063489557
- Zahira Najul, MDBayamon, PR 009611760487631
- Jose Negron Maldonado, M.D.Bayamon, PR 009611689611907
- Ruben Otero, M.D.Bayamon, PR 009611528037306
Common questions
What is Ernesto X. Marrero De Gracia, M.D.'s NPI number?
Ernesto X. Marrero De Gracia, M.D.'s National Provider Identifier (NPI) is 1295743367, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ernesto X. Marrero De Gracia, M.D. located?
The NPPES record lists a practice address at Instituto San Pablo, Bayamon, PR, 00961. Phone: (787) 740-2010. Providers update this record themselves, so call before visiting.
How can I verify Ernesto X. Marrero De Gracia, M.D.'s license?
NPPES lists Puerto Rico license number 15171, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Ernesto X. Marrero De Gracia, M.D. prescribe under Medicare Part D?
In 2024, Ernesto X. Marrero De Gracia, M.D. had 12,051 Medicare Part D claims for 664 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.