Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Elaine Lynn Chao, MS, CPNP

Pediatric Nurse Practitioner in Hacienda Heights, CA · enumerated 2010.

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

National Provider Identifier

1821305103

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Registry record

Entity type Individual (Type 1)

Name Elaine Lynn Chao

Credential MS, CPNP

Sex Female

Practice address 1850 S Azusa Ave Ste 300, Hacienda Heights, CA, 91745

Phone (626) 964-6012

Enumeration date Sep 8, 2010

Last updated in NPPES Feb 17, 2023

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 382135 (NY) 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

Is NPI 1821305103 active?

Yes, as of the latest NPPES snapshot, NPI 1821305103 is active (record last updated 2023-02-17).

How do I verify Elaine Chao's NPI record?

Cross-check NPI 1821305103 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Ning Yang Pediatrics Physician · Hacienda Heights, CA NPI 1710360581

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-17.