Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Justin William Andersen, PHD

Clinical Psychologist in Norwalk, CA · enumerated 2014 · practices at Maxim Healthcare Services, Inc..

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

National Provider Identifier

1427462357

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Registry record

Entity type Individual (Type 1)

Name Dr. Justin William Andersen

Credential PHD

Sex Male

Practice address 12501 Imperial Hwy, Norwalk, CA, 90650

Phone (562) 864-7821

Enumeration date Jun 18, 2014

Last updated in NPPES Jun 12, 2023

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Secondary

225C00000X Rehabilitation Counselor Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 94024044 (CA) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 94024044 (CA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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.

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Frequently asked questions

Where does Justin Andersen practice?

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

What is the NPI number for Justin Andersen?

The National Provider Identifier (NPI) for Justin Andersen is 1427462357, 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 2023-06-12.