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

MS. Hilda Ann Williamson, LCSW

Individual provider Mental Health Counselor · NPI 1265089312

MS. Hilda Ann Williamson, LCSW is a Clinical Social Worker in Claremont, California. Qualified in 2013, 13 years ago. Practices with Pacific Coast Psychiatric Associates Inc, a 632-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
13
Licensed in
CA
In the registry since
2019
Specialties on file
5
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 →

Practice location Address checks out

675 W Foothill Blvd Ste 200
Claremont, CA 91711-3475
Phone: (925) 282-1778
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 133700 (CA)
Mental Health Counselor Taxonomy 101YM0800X · Licence 91879 (CA)
Clinical Social Worker Taxonomy 1041C0700X · Licence 91879 (CA)
Mental Health Counselor Taxonomy 101YM0800X · Licence 133700 (CA)
Mental Health Counselor Taxonomy 101YM0800X · Licence 36413 (CA)

Record details

NPI number1265089312
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedAugust 23, 2019
Last updated in NPPESOctober 22, 2025
Certification dateOctober 22, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Pacific Coast Psychiatric Associates Inc — 632 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in Claremont