Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Holly Williamsen, MSW, LCSW

Individual provider Clinical Social Worker · NPI 1750405932

Holly Williamsen, MSW, LCSW is a Clinical Social Worker in North Hollywood, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.
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

10526 Dubnoff Way
North Hollywood, CA 91606-3921
Phone: (310) 755-4950
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 24179 (CA)

Record details

NPI number1750405932
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSW , LCSW
Sole proprietorYes
NPI enumeratedMarch 16, 2007
Last updated in NPPESMay 6, 2013

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