Luis Martinez-Sierra, M.D.
Gastroenterology Physician · Ponce, PR
Luis Martinez-Sierra, M.D. is a gastroenterology physician with a practice address in Ponce, Puerto Rico, and NPI 1376673335, issued on Mar 7, 2007. Check the license (Puerto Rico 4589, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Luis Martinez-Sierra
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 4589 PR
Self-reported in NPPES; status is on the state search - Practice location
- Santa Maria Medical, Ponce, PR 00717
- Phone
- (787) 840-5042
- Enumerated
- Mar 7, 2007
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (787) 841-6849
- Medicare enrollment
- Enrolled (PECOS I20120228000567); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 1973
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 203 in Puerto Rico → Look up another NPI →
Also registered at Santa Maria Medical
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rafael Martir-Guevara, M.DGastroenterology Physician1508996562
- Jose Torres-Vega, M.D.Internal Medicine Physician1205966322
Verify Luis Martinez-Sierra 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 4589Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,782 Medicare Part D claims for 672 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Glycopyrrolate302 claims
- Midazolam Hcl240 claims
- Pantoprazole Sodium201 claims
- Famotidine200 claims
- Meperidine Hcl150 claims
- Fentanyl Citrate102 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: $222.54
5 payments; by number, the most common kind was food and beverage; the largest payer was Madrigal Pharmaceuticals. The 13,350 providers of this specialty with any payment received $5,015.95 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 2 group practices
- Instituto DE Endoscopia Digestiva Del SurPonce, PR
- Ponce Gastroenterology SocietyPonce, PR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Luis Martinez-Sierra among 203 gastroenterology physician records in Puerto Rico
Luis Martinez-Sierra, M.D. 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 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 31% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1973 · 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 Ponce → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Rafael Martir-Guevara, M.DPonce, PR 007171508996562
- Arnaldo Nieves Ramirez, M.D.Ponce, PR 007171902866437
- Barbara Rosado Carrion, MDPonce, PR 007171467448191
- Wilfredo Vazquez, M.D.Ponce, PR 007171881656304
- Francis Zayas, MDPonce, PR 007171255314993
- Pedro Panelli, MD, MS, FACPPonce, PR 007161144226051
- Victor Torres-Ortiz, MDPonce, PR 007161679754501
- Carla Cepero-JimenezOrocovis, PR 007201821545708
Common questions
What is Luis Martinez-Sierra, M.D.'s NPI number?
Luis Martinez-Sierra, M.D.'s National Provider Identifier (NPI) is 1376673335, issued on Mar 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Luis Martinez-Sierra, M.D. located?
The NPPES record lists a practice address at Santa Maria Medical, Ponce, PR, 00717. Phone: (787) 840-5042. Providers update this record themselves, so call before visiting.
How can I verify Luis Martinez-Sierra, M.D.'s license?
NPPES lists Puerto Rico license number 4589, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Luis Martinez-Sierra, M.D. prescribe under Medicare Part D?
In 2024, Luis Martinez-Sierra, M.D. had 1,782 Medicare Part D claims for 672 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.