Lester Summerfield, PH.D.

Primary specialty

Clinical PsychologistTaxonomy code 103TC0700X

License

CA PSY 6055 Issued in CA

Practice address

4045 E Thousand Oaks Blvd Ste 220
Westlake Village, CA 91362-6977

Phone

(805) 496-6992

Fax

(805) 496-4787

NPI assigned

Oct 31, 2016

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Opted out of Medicare

Yes, effective Jul 1, 2016 through Jul 1, 2028

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Philosophy

State licenses

Practice roles

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.

• Lester Summerfield and Associates, a Psychological Corporation

  • Psychologist
  • Westlake Village, CA
  • NPI 1053465799
  NPD (past) Authorized official

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

{
    "created_epoch": "1477872000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1744156800000",
    "number": "1538611017",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "347 VENUS ST",
            "city": "THOUSAND OAKS",
            "state": "CA",
            "postal_code": "913602960",
            "telephone_number": "805-496-6992"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4045 E THOUSAND OAKS BLVD STE 220",
            "city": "WESTLAKE VILLAGE",
            "state": "CA",
            "postal_code": "913626977",
            "telephone_number": "805-496-6992",
            "fax_number": "805-496-4787"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SUMMERFIELD",
        "first_name": "LESTER",
        "credential": "PH.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2016-10-31",
        "last_updated": "2025-04-09",
        "certification_date": "2025-04-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "CA",
            "license": "CA PSY 6055",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Clinical Psychologist in Westlake Village, CA
• Providers in Westlake Village, CA by specialty
• Clinical Psychologist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 9, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.