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WILLIAM GRASSETTE MELENDEZ MD
NPI 1972515856
General Practice in Toa Baja, PR

Active since August 12, 2006PECOS Enrolled
3474 PASEO CAMARON, 3RA SECCION LEVITTOWN, TOA BAJA, PR 00949(787) 795-2521(787) 795-2289 Get Directions Write a Review

NPPES record last updated: April 11, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 11, 2018, Mar 23, 2018 (2 updates tracked since 2018).

About William Grassette Melendez Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM GRASSETTE MELENDEZ MD (NPI 1972515856) is an individual general practice provider in Toa Baja, Puerto Rico, licensed in Puerto Rico (10816) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1986).

NPPES Registry Identity

NPI1972515856
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameWILLIAM GRASSETTE MELENDEZCredential: MD
Location Address3474 PASEO CAMARON, 3RA SECCION LEVITTOWNToa Baja, PR 00949-3634
Mailing Address229 Calle Del Parque, Cond. Parque Central Apt. 904San Juan, PR 00912-3223 · (787) 795-2935
Phone(787) 795-2521
Fax(787) 795-2289
Sole ProprietorYes
Medical School CMSOtherGraduated 1986
Enumeration DateAugust 12, 2006
Last NPPES UpdateApril 11, 20182 updates tracked since enumeration
✔ NPI 1972515856 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in PR · 10816
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Grassette Melendez Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6204922974
PECOS Enrollment IDI20071011000477
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Grassette Melendez reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Csm Servicios De Cuidado Inc.
Primary Care
HF16 CALLE LIZZIE GRAHAM, SEPTIMA SECCION LEVITTOWN
Toa Baja, PR 00949
  • Reassigned Medicare billing, Puerto Rico enrollment
  • 16 clinicians in this Medicare group
NPI 1639367154 (787) 795-2911

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Grassette Melendez's NPI number?

The NPI number for William Grassette Melendez is 1972515856. It was assigned to this individual provider in the NPPES registry on August 12, 2006.

Where is William Grassette Melendez located?

William Grassette Melendez practices at 3474 Paseo Camaron 3ra Seccion Levittown, Toa Baja, PR 00949. The listed phone number is (787) 795-2521.

What is William Grassette Melendez's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is William Grassette Melendez enrolled in Medicare?

Yes. William Grassette Melendez is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Grassette Melendez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Grassette Melendez reassigns Medicare benefits to Csm Servicios De Cuidado Inc. (Toa Baja, PR). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Grassette Melendez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Grassette Melendez was last updated on April 11, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.