Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Yukyung Han, MS, RD/LD

Registered Dietitian in Duncan, OK · enumerated 2009.

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

National Provider Identifier

1992937569

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Registry record

Entity type Individual (Type 1)

Name Ms. Yukyung Han

Credential MS, RD/LD

Sex Female

Practice address 1407 N Whisenant Dr, Box 2000, Duncan, OK, 73533

Phone (580) 251-8881

Fax (580) 251-8892

Enumeration date Aug 17, 2009

Last updated in NPPES Aug 17, 2009

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 1574 (OK) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD 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 Yukyung Han?

Yukyung Han is registered in NPPES with the primary taxonomy of Registered Dietitian. 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 2009-08-17.