Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Tsui

Pharmacist in El Monte, CA · enumerated 2024.

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

National Provider Identifier

1912745134

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Registry record

Entity type Individual (Type 1)

Name Karen Tsui

Sex Female

Practice address 10953 Ramona Blvd, El Monte, CA, 91731

Phone (626) 434-2550

Enumeration date Jul 20, 2024

Last updated in NPPES Jul 20, 2024

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License S024321 (AZ) Secondary

183500000X Pharmacist Pharmacy Service Providers · License 89541 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Karen Tsui?

Karen Tsui 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.

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 2024-07-20.