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

William L Matherly, LCSW

Individual provider Clinical Social Worker · NPI 1063776011

William L Matherly, LCSW is a Clinical Social Worker in South San Francisco, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2012
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1200 El Camino Real
South San Francisco, CA 94080
Phone: (650) 742-2151
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence LCS28240 (CA)

Record details

NPI number1063776011
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJune 25, 2012
Last updated in NPPESFebruary 11, 2022

Other providers in South San Francisco