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

Dr. Adam Zachary Chester, PSYD

Clinical Neuropsychologist in Van Nuys, CA · enumerated 2023.

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

National Provider Identifier

1962109223

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Registry record

Entity type Individual (Type 1)

Name Dr. Adam Zachary Chester

Credential PSYD

Sex Male

Practice address Van Nuys, CA, 91406

Phone (310) 218-5001

Enumeration date Feb 7, 2023

Last updated in NPPES Jan 9, 2026

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 34017 (CA) Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 34017 (CA) Secondary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 34017 (CA) Primary

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 34017 (CA) Secondary

103TH0004X Health Psychologist Behavioral Health & Social Service Providers · License 34017 (CA) Secondary

103TA0700X Adult Development & Aging Psychologist Behavioral Health & Social Service Providers · License 34017 (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

Is NPI 1962109223 active?

Yes, as of the latest NPPES snapshot, NPI 1962109223 is active (record last updated 2026-01-09).

How do I verify Adam Chester's NPI record?

Cross-check NPI 1962109223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-09.