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

Marion Katherine Brennan, LCSW

Individual provider Clinical Social Worker · NPI 1326136268

Marion Katherine Brennan, LCSW is a Clinical Social Worker in Corte Madera, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
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

520 Tamalpais Dr #101
Corte Madera, CA 94925-1558
Phone: (415) 924-6415
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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 1754 (CA)

Record details

NPI number1326136268
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedOctober 10, 2006
Last updated in NPPESJuly 8, 2007

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