Hilda Ann Williamson, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

133700 Issued in CA

Practice address

675 W Foothill Blvd Ste 200
Claremont, CA 91711-3475

Phone

(925) 282-1778

NPI assigned

Aug 23, 2019

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 5

Addresses

Other names 1

• Ms. Hilda Ann Venegas Former name

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Clinical Social Worker

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Pacific Coast Psychiatric Associates IncGroup PAC ID 2567469174, 637 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Pacific Coast Psychiatric Associates Inc

  dba Lifestance Health

  • Clinical Psychologist
  • Scottsdale, AZ
  • NPI 1023125465

  CA

  Medicare reassignment Care Compare group NPD
• Tri-City Mental Health Authority

  • Community/Behavioral Health Agency
  • Pomona, CA
  • NPI 1346304920
  NPD (past)
• Tri-City Mental Health Center

  • Case Management Agency
  • Pomona, CA
  • NPI 1255651501
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1566518400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761091200000",
    "number": "1265089312",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "675 W FOOTHILL BLVD STE 200",
            "city": "CLAREMONT",
            "state": "CA",
            "postal_code": "917113475",
            "telephone_number": "925-282-1778"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "675 W FOOTHILL BLVD STE 200",
            "city": "CLAREMONT",
            "state": "CA",
            "postal_code": "917113475",
            "telephone_number": "925-282-1778"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "HILDA",
        "middle_name": "ANN",
        "name_prefix": "Ms.",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-08-23",
        "last_updated": "2025-10-22",
        "certification_date": "2025-10-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "CA",
            "license": "91879",
            "primary": false
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "133700",
            "primary": true
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "91879",
            "primary": false
        },
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "CA",
            "license": "133700",
            "primary": false
        },
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "CA",
            "license": "36413",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "HILDA",
            "last_name": "VENEGAS",
            "middle_name": "ANN",
            "prefix": "MS.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

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• Clinical Social Worker in Claremont, CA
• Providers in Claremont, CA by specialty
• Clinical Social Worker in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 22, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.