Organization Active NPI

Lake Washington Therapeutics PLLC

  • Clinical Psychologist
  • Seattle, WA
National Provider Identifier
1497675672
Registry record updated Jul 17, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical PsychologistTaxonomy code 103TC0700X
Legal business name
LAKE WASHINGTON THERAPEUTICS PLLC
Practice address
4105 E Madison St Ste 222
Seattle, WA 98112-3204
Phone
(206) 860-1752
Fax
(206) 338-6413
NPI assigned
Jul 17, 2026
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jul 17, 2026

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

Authorized official

Name
Dr. Beverly Excell Cartwright, PSY.D.NPI 1548555006
Title
Psychologist
Phone
(206) 860-1752

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical PsychologistGroup: 193400000X SINGLE SPECIALTY GROUP 103TC0700X Primary

Addresses

Primary practice location

4105 E Madison St Ste 222
Seattle, WA 98112-3204

Mailing address

4105 E Madison St Ste 222
Seattle, WA 98112-3204
Phone (206) 860-1752

National Provider Directory

National Provider Directory

Locations

4105 E Madison St
Ste 222
Seattle, WA 98112
Phone (206) 325-7774

Practitioners & affiliated clinicians

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

NPI Registry JSON

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

{
    "created_epoch": "1784246400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1784246400000",
    "number": "1497675672",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4105 E MADISON ST STE 222",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981123204",
            "telephone_number": "206-860-1752",
            "fax_number": "206-338-6413"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4105 E MADISON ST STE 222",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981123204",
            "telephone_number": "206-860-1752",
            "fax_number": "206-338-6413"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "LAKE WASHINGTON THERAPEUTICS PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-07-17",
        "last_updated": "2026-07-17",
        "certification_date": "2026-07-17",
        "status": "A",
        "authorized_official_last_name": "CARTWRIGHT",
        "authorized_official_first_name": "BEVERLY",
        "authorized_official_middle_name": "EXCELL",
        "authorized_official_title_or_position": "PSYCHOLOGIST",
        "authorized_official_telephone_number": "206-860-1752",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "PSY.D."
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Psychologist, Clinical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Seattle, WA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 17, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.