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

Patricia Joanne Williams, MSW

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1639706385

Patricia Joanne Williams, MSW is an Addiction (Substance Use Disorder) Counselor in Ontario, California. Licensed in California. Registered with an NPI since 2020.

Licensed in
CA
In the registry since
2020
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.

See every abbreviation used in this directory →

Practice location Address checks out

125 W F St
Ontario, CA 91762-3201
Phone: (909) 986-4550
Show map & directions

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

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence 10534 (CA)

Record details

NPI number1639706385
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSW
Sole proprietorNo
NPI enumeratedMarch 24, 2020
Last updated in NPPESApril 1, 2020
Certification dateApril 1, 2020

Other providers in Ontario