Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Duane Knowles, OD

Optometrist in Bountiful, UT · enumerated 2006 · practices at Standard Optical Co.

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

National Provider Identifier

1306935523

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Registry record

Entity type Individual (Type 1)

Name Duane Knowles

Credential OD

Sex Male

Practice address 140 W 5th S, Bountiful, UT, 84010

Phone (801) 292-0479

Fax (801) 292-7019

Enumeration date Oct 12, 2006

Last updated in NPPES Sep 19, 2012

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 2773469934 (UT) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
1306935523	Medicaid	UT	-
000009430	Other	UT	MEDICARE STORE #9 PTAN
000009542	Other	UT	MEDICARE STORE #11 PTAN
009037404	Other	UT	MEDICARE
000090374	Other	UT	MEDICARE STORE #10 PTAN
009602004	Other	UT	MEDICARE

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 1306935523 active?

Yes, as of the latest NPPES snapshot, NPI 1306935523 is active (record last updated 2012-09-19).

How do I verify Duane Knowles's NPI record?

Cross-check NPI 1306935523 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Standard Optical Co Optometrist · Bountiful, UT NPI 1467553990

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-19.