NPI Portal NPI Lookup & Verification

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

Alejandra Guillen

Speech-Language Assistant in West Covina, CA · enumerated 2021.

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

National Provider Identifier

1265199079

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Registry record

Entity type Individual (Type 1)
Name Alejandra Guillen
Sex Female
Practice address West Covina, CA, 91790
Enumeration date Nov 29, 2021
Last updated in NPPES Nov 29, 2021

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

Taxonomy & licenses

2355S0801X Speech-Language Assistant Speech, Language and Hearing Service Providers · License 6205 (CA) Primary

Other identifiers

Identifier Type State Issuer
6205 Other CA SLPA LICENSE

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 1265199079 active?
Yes, as of the latest NPPES snapshot, NPI 1265199079 is active (record last updated 2021-11-29).
How do I verify Alejandra Guillen's NPI record?
Cross-check NPI 1265199079 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-29.