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Dong Hum Yoon, MD

Colon & Rectal Surgery Physician in Fullerton, CA · enumerated 2016.

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

National Provider Identifier

1477915767

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Registry record

Entity type Individual (Type 1)
Name Dong Hum Yoon
Credential MD
Sex Male
Practice address 1950 Sunny Crest Dr Ste 3500, Fullerton, CA, 92835
Phone (714) 408-4249
Enumeration date Mar 24, 2016
Last updated in NPPES Sep 22, 2023

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A154606 (CA) Secondary
208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License A154606 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

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 Dong Hum Yoon?
Dong Hum Yoon is registered in NPPES with the primary taxonomy of Colon & Rectal Surgery Physician. 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 2023-09-22.