Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Hyun Namgoong, DDS

Dentist in El Segundo, CA · enumerated 2022 · practices at 61st Med Sq-Los Angeles.

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

National Provider Identifier

1578299632

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Registry record

Entity type Individual (Type 1)

Name John Hyun Namgoong

Credential DDS

Sex Male

Practice address 483 N Aviation Blvd Bldg 210, El Segundo, CA, 90245

Phone (310) 653-6844

Enumeration date Jul 29, 2022

Last updated in NPPES Sep 16, 2025

Taxonomy & licenses

122300000X Dentist Dental Providers · License 12961768-9921 (UT) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

What specialty is John Namgoong?

John Namgoong is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-16.