Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Lia Neff
Behavior Analyst in Fullerton, CA · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1285459339
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Registry record
Entity type Individual (Type 1)
Name Lia Neff
Sex Male
Practice address 713 W Commonwealth Ave, Fullerton, CA, 92832
Phone (714) 879-4274
Enumeration date Nov 22, 2024
Last updated in NPPES Nov 22, 2024
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 Lia Neff practice?
The practice location on file with NPPES is in Fullerton, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Lia Neff?
The National Provider Identifier (NPI) for Lia Neff is 1285459339, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-22.