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Keonseok Yoon, AU.D.

Audiologist in Fullerton, CA · enumerated 2023 · practices at Greater Orange County Ear Nose Throat Head & Neck Surgeons Inc.

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

National Provider Identifier

1093408262

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Registry record

Entity type Individual (Type 1)
Name Keonseok Yoon
Credential AU.D.
Sex Male
Practice address 2240 N Harbor Blvd Ste 200, Fullerton, CA, 92835
Phone (714) 447-4100
Enumeration date Jun 1, 2023
Last updated in NPPES Oct 27, 2023

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 743 (CT) Secondary
231H00000X Audiologist Speech, Language and Hearing Service Providers · License 3850 (CA) Primary
AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders. About the AUD 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 Keonseok Yoon's NPI record?
Cross-check NPI 1093408262 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1093408262 active?
Yes, as of the latest NPPES snapshot, NPI 1093408262 is active (record last updated 2023-10-27).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-27.