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

Mrs. Gwendolyn Harville Washington, LCSW

Individual provider Clinical Social Worker · NPI 1467509968

Mrs. Gwendolyn Harville Washington, LCSW is a Clinical Social Worker in Rancho Cucamonga, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
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.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

9089 Baseline Rd Ste 200
Rancho Cucamonga, CA 91730-1295
Phone: (909) 210-5895
Fax: (909) 989-3932
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 LCS 22188 (CA)

Record details

NPI number1467509968
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJanuary 5, 2007
Last updated in NPPESSeptember 26, 2013

Other providers in Rancho Cucamonga