Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Ellen Chong

Pharmacist in Antioch, CA · enumerated 2010.

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

National Provider Identifier

1841522539

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ellen Chong

Sex Female

Practice address 4501 Sand Creek Rd, Antioch, CA, 94531

Phone (925) 813-7280

Enumeration date Feb 4, 2010

Last updated in NPPES Feb 4, 2010

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 54819 (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

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 Ellen Chong?

Ellen Chong is registered in NPPES with the primary taxonomy of Pharmacist. 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 2010-02-04.