William Marrero Leon, MD
NPI 1396356549 · General Practice Physician · Manati, PR
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Marrero Leon, MD is a General Practice Physician provider in Manati, PR (NPI 1396356549).
Provider details
- NPI number
- 1396356549
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 15441 (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
5 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 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 79 | 23 |
| Gabapentin | 56 | 14 |
| Levothyroxine Sodiumbrand: Synthroid | 47 | 16 |
| Metoprolol Succinate | 45 | 16 |
| Amlodipine Besylate | 40 | 16 |
| Atorvastatin Calcium | 37 | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$249 across 11 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
- 2020-08-12
- Last updated
- 2021-12-03
- Certified
- 2021-09-08
Frequently asked questions
- What is William Marrero Leon's NPI number?
- William Marrero Leon's National Provider Identifier (NPI) is 1396356549, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Marrero Leon's specialty?
- William Marrero Leon is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is William Marrero Leon located?
- William Marrero Leon's practice location on file with NPPES is Calle Hernandes Carrion Carr #2, Manati, PR 00674-1142.
- What is William Marrero Leon's phone number?
- The practice phone number listed in the NPPES registry for William Marrero Leon is (787) 621-3700.
- Does William Marrero Leon accept Medicare?
- William Marrero Leon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Marrero Leon's NPI active?
- Yes — William Marrero Leon's NPI (1396356549) is active in the NPPES registry as of the last update on 2021-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.