Hilda Williamson, LCSW
NPI 1265089312 · Clinical Social Worker · Claremont, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hilda Williamson, LCSW is a Clinical Social Worker provider in Claremont, CA (NPI 1265089312).
Provider details
- NPI number
- 1265089312
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 91879 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-08-23
- Last updated
- 2025-10-22
- Certified
- 2025-10-22
Frequently asked questions
- What is Hilda Williamson's NPI number?
- Hilda Williamson's National Provider Identifier (NPI) is 1265089312, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hilda Williamson's specialty?
- Hilda Williamson is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Hilda Williamson located?
- Hilda Williamson's practice location on file with NPPES is 675 W Foothill Blvd Ste 200, Claremont, CA 91711-3475.
- What is Hilda Williamson's phone number?
- The practice phone number listed in the NPPES registry for Hilda Williamson is (925) 282-1778.
- Does Hilda Williamson accept Medicare?
- Hilda Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hilda Williamson's NPI active?
- Yes — Hilda Williamson's NPI (1265089312) is active in the NPPES registry as of the last update on 2025-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.