Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Dexter Jay Jefferson Jr., LCSW

Clinical Social Worker in Rancho Palos Verdes, CA · enumerated 2007.

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

National Provider Identifier

1326177072

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Dexter Jay Jefferson Jr.

Credential LCSW

Sex Male

Practice address 28924 S Western Ave Ste 225, Rancho Palos Verdes, CA, 90275

Phone (310) 593-4996

Enumeration date Mar 5, 2007

Last updated in NPPES Jul 14, 2024

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 75049 (CA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

What is the NPI number for Dexter Jefferson?

The National Provider Identifier (NPI) for Dexter Jefferson is 1326177072, a Type 1 (individual) record in the CMS NPPES registry.

Where does Dexter Jefferson practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-14.