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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Clark B. Holladay, LCSW

Clinical Social Worker in Salt Lake City, UT · enumerated 2006.

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

National Provider Identifier

1437221454

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Registry record

Entity type Individual (Type 1)
Name Mr. Clark B. Holladay
Credential LCSW
Sex Male
Practice address 344 E 100 S Ste 301, Salt Lake City, UT, 84111
Phone (801) 428-4257
Enumeration date Nov 14, 2006
Last updated in NPPES Jan 5, 2022

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 265550-3501 (UT) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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.

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Frequently asked questions

How do I verify Clark Holladay's NPI record?
Cross-check NPI 1437221454 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1437221454 active?
Yes, as of the latest NPPES snapshot, NPI 1437221454 is active (record last updated 2022-01-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-05.