Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Kathy Koo-Yeonsu Williams, LCSW

Individual provider Clinical Social Worker · NPI 1023946514

Kathy Koo-Yeonsu Williams, LCSW is a Clinical Social Worker in Oakland, California. Works from 2 locations. Licensed in California.

Licensed in
CA
In the registry since
2026
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

3800 Coolidge Ave
Oakland, CA 94602-3399
Phone: (510) 482-2244
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2039 Clement Ave, Alameda, CA 94501-1317 — (408) 892-7203

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 126548 (CA)

Record details

NPI number1023946514
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedMay 13, 2026
Last updated in NPPESAugust 5, 2026
Certification dateAugust 5, 2026

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