Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kay Khanh Bui, HAD

Hearing Instrument Specialist in Fullerton, CA · enumerated 2012 · practices at Hana T. Bui, MD, A Professional Corporation.

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

National Provider Identifier

1871844688

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Registry record

Entity type Individual (Type 1)

Name Kay Khanh Bui

Credential HAD

Sex Female

Practice address 1321 N Harbor Blvd Ste 101, Fullerton, CA, 92835

Phone (714) 870-4822

Fax (714) 870-4804

Enumeration date Sep 20, 2012

Last updated in NPPES Sep 21, 2012

Taxonomy & licenses

237700000X Hearing Instrument Specialist Speech, Language and Hearing Service Providers · License HA7651 (CA) Primary

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 Kay Bui's NPI record?

Cross-check NPI 1871844688 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1871844688 active?

Yes, as of the latest NPPES snapshot, NPI 1871844688 is active (record last updated 2012-09-21).

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Hana T. Bui, MD, A Professional Corporation Otology & Neurotology Physician · Fullerton, CA NPI 1932253960 Erin Newman Audiologist · Fullerton, CA NPI 1306991344

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-21.