Nancy Marrero Viera, MD
NPI 1134370091 · General Practice Physician · Hatillo, PR
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Marrero Viera, MD is a General Practice Physician provider in Hatillo, PR (NPI 1134370091).
Provider details
- NPI number
- 1134370091
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 17325 (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
17 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 · 166 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 745 | 117 |
| Gabapentin | 643 | 94 |
| Pantoprazole Sodium | 510 | 69 |
| Levothyroxine Sodiumbrand: Synthroid | 429 | 71 |
| Atorvastatin Calcium | 414 | 118 |
| Omeprazole | 338 | 52 |
| Simvastatin | 313 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$73 across 4 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
- 2008-10-08
- Last updated
- 2013-01-25
Frequently asked questions
- What is Nancy Marrero Viera's NPI number?
- Nancy Marrero Viera's National Provider Identifier (NPI) is 1134370091, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Marrero Viera's specialty?
- Nancy Marrero Viera is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Marrero Viera located?
- Nancy Marrero Viera's practice location on file with NPPES is Carr 490 Km 3.7 Solar #61, Hatillo, PR 00659.
- What is Nancy Marrero Viera's phone number?
- The practice phone number listed in the NPPES registry for Nancy Marrero Viera is (787) 820-8082.
- Does Nancy Marrero Viera accept Medicare?
- Nancy Marrero Viera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Marrero Viera's NPI active?
- Yes — Nancy Marrero Viera's NPI (1134370091) is active in the NPPES registry as of the last update on 2013-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.