Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Jose Diaz De Leon
Behavior Analyst in Alhambra, CA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588237911
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Registry record
Entity type Individual (Type 1)
Name Jose Diaz De Leon
Sex Male
Practice address 1000 S Fremont Ave Bldg A-5, Alhambra, CA, 91803
Phone (310) 374-3300
Enumeration date Jul 22, 2021
Last updated in NPPES Aug 11, 2023
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-23-66501 (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.
Frequently asked questions
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.
What specialty is Jose Diaz De Leon?
Jose Diaz De Leon is registered in NPPES with the primary taxonomy of Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-11.