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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM PEREZ GUILLAMA PHARMD
NPI 1104793447
Pharmacist in Bayamon, PR

Active since October 21, 2025
CARR 167 CALLE MARGINAL OESTE PLAZA TROPICAL, BARRIO CERRO GORDO, BAYAMON, PR 00956(787) 395-7480 Get Directions Write a Review

NPPES record last updated: October 5, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

About William Perez Guillama Pharmd NPPES

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

WILLIAM PEREZ GUILLAMA PHARMD (NPI 1104793447) is an individual pharmacist in Bayamon, Puerto Rico, licensed in Puerto Rico (8457) and active in the NPI registry since October 2025.

NPPES Registry Identity

NPI1104793447
Entity TypeIndividualMale
Primary Taxonomy183500000X
Provider Legal NameWILLIAM PEREZ GUILLAMACredential: PHARMD
Location AddressCARR 167 CALLE MARGINAL OESTE PLAZA TROPICAL, BARRIO CERRO GORDOBayamon, PR 00956
Mailing AddressPo Box 781Camuy, PR 00627-0781 · (787) 395-7480
Phone(787) 395-7480
Sole ProprietorYes
Enumeration DateOctober 21, 2025
Last NPPES UpdateOctober 5, 2026
NPPES CertifiedOctober 5, 2026
✔ NPI 1104793447 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPharmacistPharmacy Service Providers
Taxonomy Code183500000X
License✔ Licensed in PR · 8457
Definition
An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care.

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 Perez Guillama's NPI number?

The NPI number for William Perez Guillama is 1104793447. It was assigned to this individual provider in the NPPES registry on October 21, 2025.

Where is William Perez Guillama located?

William Perez Guillama practices at Carr 167 Calle Marginal Oeste Plaza Tropical Barrio Cerro Gordo, Bayamon, PR 00956. The listed phone number is (787) 395-7480.

What is William Perez Guillama's specialty?

The primary specialty registered for this NPI is Pharmacist with taxonomy code 183500000X.

When was this NPI record last updated?

The NPPES record for William Perez Guillama was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.