NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Karen Trieu Ly

Pharmacist in Rosemead, CA · enumerated 2020.

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

National Provider Identifier

1588297543

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Registry record

Entity type Individual (Type 1)
Name Karen Trieu Ly
Sex Female
Practice address Rosemead, CA, 91770
Phone (626) 573-5094
Enumeration date Feb 19, 2020
Last updated in NPPES Sep 17, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 81986 (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

Where does Karen Ly practice?
The practice location on file with NPPES is in Rosemead, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Karen Ly?
The National Provider Identifier (NPI) for Karen Ly is 1588297543, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-17.