NPI Portal NPI Lookup & Verification

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

Barbara Kwai Heung Yau

Clinical Social Worker in Arcadia, CA · enumerated 2006.

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

National Provider Identifier

1700951084

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Registry record

Entity type Individual (Type 1)
Name Barbara Kwai Heung Yau
Sex Female
Practice address Arcadia, CA, 91006
Phone (626) 294-2043
Fax (626) 821-0858
Enumeration date Nov 21, 2006
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS 10012 (CA) Primary

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.

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Frequently asked questions

What is the NPI number for Barbara Yau?
The National Provider Identifier (NPI) for Barbara Yau is 1700951084, a Type 1 (individual) record in the CMS NPPES registry.
Where does Barbara Yau practice?
The practice location on file with NPPES is in Arcadia, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.