Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nicholas Halloran

Behavior Analyst in San Marcos, CA · enumerated 2022.

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

National Provider Identifier

1255082657

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Registry record

Entity type Individual (Type 1)

Name Nicholas Halloran

Sex Male

Practice address 334 Via Vera Cruz Ste 107, San Marcos, CA, 92078

Phone (760) 304-5010

Enumeration date Jan 17, 2022

Last updated in NPPES Jan 17, 2022

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

Where does Nicholas Halloran practice?

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

What is the NPI number for Nicholas Halloran?

The National Provider Identifier (NPI) for Nicholas Halloran is 1255082657, 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 2022-01-17.