Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arthur Wayne Frederick, M.S.W., L.C.S.W.

Social Worker in Los Osos, CA · enumerated 2012.

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

National Provider Identifier

1780931261

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Registry record

Entity type Individual (Type 1)

Name Arthur Wayne Frederick

Credential M.S.W., L.C.S.W.

Sex Male

Practice address 1800 Donna Ave, Los Osos, CA, 93402

Phone (805) 123-4567

Enumeration date Aug 14, 2012

Last updated in NPPES Aug 14, 2012

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LCS10732 (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

Where does Arthur Frederick practice?

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

What is the NPI number for Arthur Frederick?

The National Provider Identifier (NPI) for Arthur Frederick is 1780931261, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-08-14.