Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Arellano, BA, MS, BCBA

Behavior Analyst in Torrance, CA · enumerated 2018.

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

National Provider Identifier

1043719099

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Registry record

Entity type Individual (Type 1)

Name Matthew Arellano

Credential BA, MS, BCBA

Sex Male

Practice address 23842 Hawthorne Blvd Ste 100&101, Torrance, CA, 90505

Phone (424) 999-2990

Enumeration date Feb 6, 2018

Last updated in NPPES Oct 5, 2021

Taxonomy & licenses

106S00000X Behavior Technician Behavioral Health & Social Service Providers · License 00003054 (CA) Secondary

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-21-52817 (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

Where does Matthew Arellano practice?

The practice location on file with NPPES is in Torrance, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Matthew Arellano?

The National Provider Identifier (NPI) for Matthew Arellano is 1043719099, 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 2021-10-05.