Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander John Castillo, BCBA

Behavior Analyst in Phoenix, AZ · enumerated 2025.

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

National Provider Identifier

1336024637

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Registry record

Entity type Individual (Type 1)

Name Alexander John Castillo

Credential BCBA

Sex Male

Practice address 13838 S 46th Pl Ste 120, Phoenix, AZ, 85044

Phone (407) 501-8641

Enumeration date Aug 7, 2025

Last updated in NPPES Aug 7, 2025

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers 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

Is NPI 1336024637 active?

Yes, as of the latest NPPES snapshot, NPI 1336024637 is active (record last updated 2025-08-07).

How do I verify Alexander Castillo's NPI record?

Cross-check NPI 1336024637 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 2025-08-07.