Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alexander Leininger
Behavior Technician in El Cajon, CA · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1356042345
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Registry record
Entity type Individual (Type 1)
Name Alexander Leininger
Sex Male
Practice address 321 Van Houten Ave, El Cajon, CA, 92020
Phone (855) 223-7123
Fax (619) 374-7134
Enumeration date Mar 15, 2023
Last updated in NPPES Mar 15, 2023
Taxonomy & licenses
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
Where does Alexander Leininger practice?
The practice location on file with NPPES is in El Cajon, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Alexander Leininger?
The National Provider Identifier (NPI) for Alexander Leininger is 1356042345, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Madeline Aguirre Behavior Analyst · El Cajon, CA NPI 1639612955 Albena Apostolova Rank Behavior Analyst · El Cajon, CA NPI 1568901320 Maricris Nailes Behavior Analyst · El Cajon, CA NPI 1710491576 Liana Babayan Behavior Analyst · El Cajon, CA NPI 1003324641 Kaela Potter Behavior Analyst · El Cajon, CA NPI 1043718828 Nicholas Woo-Vonhoogenstyn Behavior Analyst · El Cajon, CA NPI 1316447089 Mariah Arevalo Behavior Technician · El Cajon, CA NPI 1699275230 Victoria Ham Behavior Technician · El Cajon, CA NPI 1033610258
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-15.