Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Keith J. Castleton, O.D.

Optometrist in Salt Lake City, UT · enumerated 2006.

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

National Provider Identifier

1730168071

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Registry record

Entity type Individual (Type 1)

Name Dr. Keith J. Castleton

Credential O.D.

Sex Male

Practice address 660 S 200 E Ste 250, Salt Lake City, UT, 84111

Phone (801) 359-2256

Enumeration date Jan 13, 2006

Last updated in NPPES Dec 19, 2024

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 5350538-9934 (UT) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 1475 (AZ) Primary

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

Keith Castleton is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-19.