Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Alison L Duncan, PSYD., BCBA

Clinical Child & Adolescent Psychologist in Garden Grove, CA · enumerated 2012.

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

National Provider Identifier

1992049639

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Alison L Duncan

Credential PSYD., BCBA

Sex Female

Practice address Garden Grove, CA, 92845

Phone (203) 494-1328

Enumeration date Nov 19, 2012

Last updated in NPPES Jan 10, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License PSY28009 (CA) Primary

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1118786 (CA) Secondary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Alison Duncan practice?

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

What is the NPI number for Alison Duncan?

The National Provider Identifier (NPI) for Alison Duncan is 1992049639, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-10.