Ramon A. Marrero, MD
Gastroenterology Physician · Bayamon, PR
Ramon A. Marrero, MD is a gastroenterology physician with a practice address in Bayamon, Puerto Rico, and NPI 1336252907, issued on Aug 16, 2006. Check the license (Puerto Rico 8427, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ramon A. Marrero
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 8427 PR
Self-reported in NPPES; status is on the state search - Practice location
- Galeria Medica,sta.cruz 64, Bayamon, PR 00959
- Phone
- (787) 785-8560
- Enumerated
- Aug 16, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (787) 785-8562
- Medicare enrollment
- Enrolled (PECOS I20090116000142); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 203 in Puerto Rico → Look up another NPI →
Verify Ramon A. Marrero 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 8427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average gastroenterology physician in 2024
2,265 Medicare Part D claims for 603 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Famotidine599 claims
- Pantoprazole Sodium360 claims
- Sucralfate263 claims
- Omeprazole157 claims
- Sutab103 claims
- Suprep101 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.
Ramon A. Marrero among 203 gastroenterology physician records in Puerto Rico
Ramon A. Marrero, MD is one of 203 gastroenterology physician records with a practice address in Puerto Rico. 92% 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 20% of them.
- NPI issued2006 · 20% of these records are older, 51% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1984 · median 2000 among the 165 with a school on file
- Record last updated2007 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Puerto Rico
There are 203 gastroenterology physician records in Puerto Rico.
All 203 in Puerto Rico → Every provider in Bayamon → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Ricardo Arroyo, M.D.Bayamon, PR 009591750491056
- Veronica Beyley-Pagan, M.D.Bayamon, PR 009591790043503
- Viviana Blanco, MDBayamon, PR 009591356894398
- Leonardo Castro, M.D.Bayamon, PR 009591871641969
- Santiago Coste-Sibilia, M.D.Bayamon, PR 009591629413323
- Maria Dueno, M.D.Bayamon, PR 009591295766855
- Ivelisse Ramirez, MDBayamon, PR 009591083696629
- David RiveraBayamon, PR 009591851334262
Common questions
What is Ramon A. Marrero, MD's NPI number?
Ramon A. Marrero, MD's National Provider Identifier (NPI) is 1336252907, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ramon A. Marrero, MD located?
The NPPES record lists a practice address at Galeria Medica,sta.cruz 64, Bayamon, PR, 00959. Phone: (787) 785-8560. Providers update this record themselves, so call before visiting.
How can I verify Ramon A. Marrero, MD's license?
NPPES lists Puerto Rico license number 8427, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Ramon A. Marrero, MD prescribe under Medicare Part D?
In 2024, Ramon A. Marrero, MD had 2,265 Medicare Part D claims for 603 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.