Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Onna Alexander, LCSW

Clinical Social Worker in Richmond, CA · enumerated 2007.

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

National Provider Identifier

1235281486

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Registry record

Entity type Individual (Type 1)

Name Onna Alexander

Credential LCSW

Sex Female

Practice address 84 Broadway, Richmond, CA, 94804

Phone (510) 231-7812

Fax (510) 231-7810

Enumeration date Jan 17, 2007

Last updated in NPPES May 3, 2023

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 21617 (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 Onna Alexander?

The National Provider Identifier (NPI) for Onna Alexander is 1235281486, a Type 1 (individual) record in the CMS NPPES registry.

Where does Onna Alexander practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-03.