Luis Martinez-Sierra, M.D.
NPI 1376673335 · Gastroenterology Physician · Ponce, PR
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Luis Martinez-Sierra, M.D. is a Gastroenterology Physician provider in Ponce, PR (NPI 1376673335).
Provider details
- NPI number
- 1376673335
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4589 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Glycopyrrolate | 302 | 135 |
| Midazolam Hcl | 240 | 236 |
| Midazolam Hcl/Pfbrand: Midazolam Hcl | 201 | 194 |
| Pantoprazole Sodium | 201 | 65 |
| Famotidine | 200 | 59 |
| Meperidine Hcl/Pfbrand: Meperidine Hcl | 150 | 145 |
| Fentanyl Citrate/Pfbrand: Fentanyl Citrate | 102 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$223 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-07
- Last updated
- 2007-07-09
Frequently asked questions
- What is Luis Martinez-Sierra's NPI number?
- Luis Martinez-Sierra's National Provider Identifier (NPI) is 1376673335, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Luis Martinez-Sierra's specialty?
- Luis Martinez-Sierra is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Luis Martinez-Sierra located?
- Luis Martinez-Sierra's practice location on file with NPPES is Santa Maria Medical, Ponce, PR 00717-1105.
- What is Luis Martinez-Sierra's phone number?
- The practice phone number listed in the NPPES registry for Luis Martinez-Sierra is (787) 840-5042.
- Does Luis Martinez-Sierra accept Medicare?
- Luis Martinez-Sierra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Luis Martinez-Sierra's NPI active?
- Yes — Luis Martinez-Sierra's NPI (1376673335) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.