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

MS. Sylvia E Castillo, LCSW

Individual provider Clinical Social Worker · NPI 1790834844

MS. Sylvia E Castillo, LCSW is a Clinical Social Worker in Walnut Creek, California. Practices as a sole proprietor. Registered with an NPI since 2007.

In the registry since
2007
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

1425 S Main St Dept OF Mental Health
Walnut Creek, CA 94596-5318
Phone: (925) 295-5349
Fax: (925) 295-5226
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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

Record details

NPI number1790834844
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJanuary 9, 2007
Last updated in NPPESJuly 8, 2007
Mailing address1425 S Main St, Dept Of Mental Health, Walnut Creek, CA 94596-5318

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