Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Welch, R.PH.

Pharmacist in Denver, CO · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1891787107

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Registry record

Entity type Individual (Type 1)

Name Mr. William Welch

Credential R.PH.

Sex Male

Practice address 4353 E Colfax Ave, Denver, CO, 80220

Phone (303) 504-1922

Fax (303) 320-6388

Enumeration date Aug 22, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 13354 (CO) Primary

183500000X Pharmacist Pharmacy Service Providers · License 8541 (OK) Secondary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is William Welch?

William Welch is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Kelly Ensminger Pharmacist · Denver, CO NPI 1538271168 Keith Chipman Adult Psychiatric/Mental Health Registered Nurse · Denver, CO NPI 1144394040 John Schutte Mental Health Counselor · Denver, CO NPI 1518001775 Kevin Falk Case Manager/Care Coordinator · Denver, CO NPI 1407990799 Ben Barone Clinical Social Worker · Denver, CO NPI 1588709265 Kevin Kimberling Registered Nurse · Denver, CO NPI 1649308370 Dan Crystal Counselor · Denver, CO NPI 1356471379 Anne Hammond Case Manager/Care Coordinator · Denver, CO NPI 1598895526

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.