Luis Diaz, M.D.
NPI 1821134297 · General Practice Physician · Arecibo, PR
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Luis Diaz, M.D. is a General Practice Physician provider in Arecibo, PR (NPI 1821134297).
Provider details
- NPI number
- 1821134297
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 8248 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 · 82 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 240 | 79 |
| Famotidine | 238 | 51 |
| Omeprazole | 213 | 41 |
| Gabapentin | 181 | 44 |
| Metformin Hcl | 160 | 52 |
| Losartan Potassium | 157 | 52 |
| Amlodipine Besylate | 135 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$89 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
- 2007-01-30
- Last updated
- 2024-07-16
- Certified
- 2024-07-16
Frequently asked questions
- What is Luis Diaz's NPI number?
- Luis Diaz's National Provider Identifier (NPI) is 1821134297, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Luis Diaz's specialty?
- Luis Diaz is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Luis Diaz located?
- Luis Diaz's practice location on file with NPPES is 175 Calle San Felipe, Arecibo, PR 00612-4605.
- What is Luis Diaz's phone number?
- The practice phone number listed in the NPPES registry for Luis Diaz is (787) 879-3995.
- Does Luis Diaz accept Medicare?
- Luis Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Luis Diaz's NPI active?
- Yes — Luis Diaz's NPI (1821134297) is active in the NPPES registry as of the last update on 2024-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.