Hilda Ann Williamson, LCSW
Clinical Social Worker · Claremont, CA
Hilda Ann Williamson, LCSW is a clinical social worker with a practice address in Claremont, California, and NPI 1265089312, issued on Aug 23, 2019. Check the license (California 133700, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Hilda Ann Williamson
- Credential
- LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- 133700 CA
36413 CA
91879 CA
Self-reported in NPPES; status is on the state search - Practice location
- 675 W Foothill Blvd Ste 200, Claremont, CA 91711
- Phone
- (925) 282-1778
- Enumerated
- Aug 23, 2019
- Record last updated
- Oct 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20251104004383); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 36,261 in California → Look up another NPI →
Also registered at 675 W Foothill Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rebecca Beckett, RN, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1063028405
- Nadine Bouz Turk, PSYD, LPClinical Psychologist1669254553
- Briana Brewster, LCSWClinical Social Worker1407338767
- Jacqueline Chan, PMHNPPsychiatric/Mental Health Nurse Practitioner1740988120
Verify Hilda Ann Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 133700Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Pacific Coast Psychiatric Associates IncClaremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hilda Ann Williamson among 36,261 clinical social worker records in California
Hilda Ann Williamson, LCSW is one of 36,261 clinical social worker records with a practice address in California. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 67% of them.
- NPI issued2019 · 67% of these records are older, 28% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated2013 · median 2012 among the 4,008 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
48 clinical social worker records list a practice address in Claremont
They are 48 of the 800 NPPES records with a practice address in Claremont, and 36,261 clinical social worker records in California.
All 36,261 in California → Every provider in Claremont → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Katharine Albert, M.S.W.Claremont, CA 917111700075280
- Lisa Baez, L.C.S.W.Claremont, CA 917111225102130
- Barbara Berg, LCSWClaremont, CA 917111386623635
- Marissa Garcia Soria, MSW, LCSWClaremont, CA 917111467530998
- Behnam GhahramaniClaremont, CA 917111881847804
- Andrea Heitz, L.C.S.W.Claremont, CA 917111215149240
- Elaine Karas, MSW, LCSWClaremont, CA 917111841497468
- Kirby Palmer, LCSW MSWClaremont, CA 917111902974579
Common questions
What is Hilda Ann Williamson, LCSW's NPI number?
Hilda Ann Williamson, LCSW's National Provider Identifier (NPI) is 1265089312, issued on Aug 23, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Hilda Ann Williamson, LCSW located?
The NPPES record lists a practice address at 675 W Foothill Blvd Ste 200, Claremont, CA, 91711. Phone: (925) 282-1778. Providers update this record themselves, so call before visiting.
How can I verify Hilda Ann Williamson, LCSW's license?
NPPES lists California license number 133700, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.