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

MR. WILLIAM WELCH R.PH.
NPI 1891787107
Pharmacist in Denver, CO

Active since August 22, 2005
4353 E COLFAX AVE, DENVER, CO 80220(303) 504-1922(303) 320-6388 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mr. William Welch R.ph. NPPES

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

MR. WILLIAM WELCH R.PH. (NPI 1891787107) is an individual pharmacist in Denver, Colorado, licensed in Colorado (13354) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1891787107
Entity TypeIndividualMale
Primary Taxonomy183500000X
Provider Legal NameMR. WILLIAM WELCHCredential: R.PH.
Location Address4353 E COLFAX AVEDenver, CO 80220-1115
Mailing Address6319 S Jasmine WayCentennial, CO 80111-4312 · (303) 771-3561
Fax(303) 320-6388
Sole ProprietorNo
Enumeration DateAugust 22, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1891787107 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPharmacistPharmacy Service Providers
Taxonomy Code183500000X
Licenses Licensed in CO · 13354 Licensed in OK · 8541
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.
4353 E COLFAX AVE, Denver, CO 80220

Other Providers at the Same Location NPPES 20

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

Case Manager/Care Coordinator
4353 E COLFAX AVE
DENVER, CO 80220
Licensed Practical Nurse
4353 E COLFAX AVE
DENVER, CO 80220
Clinic/Center (Mental Health (Including Community Mental Health Center))
4353 E COLFAX AVE
DENVER, CO 80220
Nurse Practitioner (Psychiatric/Mental Health)
4353 E COLFAX AVE
DENVER, CO 80220
Social Worker (Clinical)
4353 E COLFAX AVE
DENVER, CO 80220
Registered Nurse
4353 E COLFAX AVE
DENVER, CO 80220
Counselor (Professional)
4353 E COLFAX AVE
DENVER, CO 80220
Registered Nurse (Hemodialysis)
4353 E COLFAX AVE
DENVER, CO 80220

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 Welch's NPI number?

The NPI number for William Welch is 1891787107. It was assigned to this individual provider in the NPPES registry on August 22, 2005.

Where is William Welch located?

William Welch practices at 4353 E Colfax Ave, Denver, CO 80220. The listed phone number is (303) 504-1922.

What is William Welch'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 Welch was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 32 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.