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DR. WILLIAM ERNESTO IRIZARRY JR. PHARM.D.
NPI 1982071759
Pharmacist - Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist in Thornton, CO

Active since August 28, 2015
3801 E 120TH AVE, THORNTON, CO 80233(303) 451-9470 Get Directions Write a Review

NPPES record last updated: June 3, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 3, 2026, May 9, 2024 (2 updates tracked since 2024).

About Dr. William Ernesto Irizarry Jr. Pharm.d. NPPES

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

DR. WILLIAM ERNESTO IRIZARRY JR. PHARM.D. (NPI 1982071759) is an individual pharmacist clinician (phc)/ clinical pharmacy specialist in Thornton, Colorado, licensed in Colorado (20869) and active in the NPI registry since August 2015.

NPPES Registry Identity

NPI1982071759
Entity TypeIndividualMale
Primary Taxonomy1835P0018X
Provider Legal NameDR. WILLIAM ERNESTO IRIZARRY JR.Credential: PHARM.D.
Location Address3801 E 120TH AVEThornton, CO 80233-6701
Mailing Address12731 Glencoe StThornton, CO 80241-3311 · (915) 309-0403
Phone(303) 451-9470
Sole ProprietorNo
Enumeration DateAugust 28, 2015
Last NPPES UpdateJune 3, 20262 updates tracked since enumeration
NPPES CertifiedJune 3, 2026
✔ NPI 1982071759 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPharmacist · Pharmacist Clinician (PhC)/ Clinical Pharmacy SpecialistPharmacy Service Providers
Taxonomy Code1835P0018X
License✔ Licensed in CO · 20869
Definition
Pharmacist Clinician/Clinical Pharmacy Specialist is a pharmacist with additional training and an expanded scope of practice that may include prescriptive authority, therapeutic management, and disease management.
3801 E 120TH AVE, Thornton, CO 80233
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Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALEXANDER NGUYEN
Pharmacist
3801 E 120TH AVE
THORNTON, CO 80233
Adams County (303) 451-9470
DILLON COMPANIES LLC
Pharmacy (Community/Retail Pharmacy)
3801 E 120TH AVE
THORNTON, CO 80233
Adams County (303) 451-9470
YI WANG PHARM D.
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
3801 E 120TH AVE
THORNTON, CO 80233
Adams County (303) 451-9470
DILLON COMPANIES INC.
Pharmacist
3801 E 120TH AVE
THORNTON, CO 80233
Adams County (303) 451-9470
ANDY LEI PHARMD
Pharmacist
3801 E 120TH AVE
THORNTON, CO 80233
Adams County (303) 451-9470

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 Irizarry's NPI number?

The NPI number for William Irizarry is 1982071759. It was assigned to this individual provider in the NPPES registry on August 28, 2015.

Where is William Irizarry located?

William Irizarry practices at 3801 E 120th Ave, Thornton, CO 80233. The listed phone number is (303) 451-9470.

What is William Irizarry's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist, with taxonomy code 1835P0018X.

When was this NPI record last updated?

The NPPES record for William Irizarry was last updated on June 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.