William Grassette Melendez, MD
NPI 1972515856 · General Practice Physician · Toa Baja, PR
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Grassette Melendez, MD is a General Practice Physician provider in Toa Baja, PR (NPI 1972515856).
Provider details
- NPI number
- 1972515856
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 10816 (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 · 101 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Simvastatin | 539 | 189 |
| Hydrochlorothiazide | 441 | 149 |
| Lisinopril | 292 | 103 |
| Gabapentin | 274 | 68 |
| Metformin Hcl | 257 | 86 |
| Omeprazole | 246 | 62 |
| Levothyroxine Sodiumbrand: Synthroid | 245 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24 across 1 record (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
- 2006-08-12
- Last updated
- 2018-04-11
Frequently asked questions
- What is William Grassette Melendez's NPI number?
- William Grassette Melendez's National Provider Identifier (NPI) is 1972515856, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Grassette Melendez's specialty?
- William Grassette Melendez is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is William Grassette Melendez located?
- William Grassette Melendez's practice location on file with NPPES is 3474 Paseo Camaron, Toa Baja, PR 00949-3634.
- What is William Grassette Melendez's phone number?
- The practice phone number listed in the NPPES registry for William Grassette Melendez is (787) 795-2521.
- Does William Grassette Melendez accept Medicare?
- William Grassette Melendez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Grassette Melendez's NPI active?
- Yes — William Grassette Melendez's NPI (1972515856) is active in the NPPES registry as of the last update on 2018-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.