Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Arthur Silliman, PHARMACIST

Pharmacist in West Valley, UT · enumerated 2012.

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

National Provider Identifier

1619229085

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Registry record

Entity type Individual (Type 1)

Name Mr. William Arthur Silliman

Credential PHARMACIST

Sex Male

Practice address 3725 W 4100 S, West Valley, UT, 84120

Phone (801) 965-3639

Enumeration date Oct 10, 2012

Last updated in NPPES Oct 10, 2012

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 6609656-1701 (UT) Primary

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 NPI 1619229085 active?

Yes, as of the latest NPPES snapshot, NPI 1619229085 is active (record last updated 2012-10-10).

How do I verify William Silliman's NPI record?

Cross-check NPI 1619229085 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-10.