Cornerstone Addison LLC

Primary specialty

Clinical Medical LaboratoryTaxonomy code 291U00000X

Legal business name

CORNERSTONE ADDISON LLC

Practice address

4007 Lindbergh Dr
Addison, TX 75001-4343

Phone

(972) 755-1034

NPI assigned

Aug 5, 2025

Last updated

Jan 17, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Amy Gruszecki, MD

Title

Laboratory Director

Phone

(972) 755-1034

Specialties & licenses 1

Addresses

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

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

{
    "created_epoch": "1754352000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1768608000000",
    "number": "1417831934",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4007 LINDBERGH DR",
            "city": "ADDISON",
            "state": "TX",
            "postal_code": "750014343",
            "telephone_number": "972-755-1034"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4007 LINDBERGH DR",
            "city": "ADDISON",
            "state": "TX",
            "postal_code": "750014343",
            "telephone_number": "972-755-1034"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "CORNERSTONE ADDISON LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-08-05",
        "last_updated": "2026-01-17",
        "certification_date": "2026-01-17",
        "status": "A",
        "authorized_official_last_name": "GRUSZECKI",
        "authorized_official_first_name": "AMY",
        "authorized_official_title_or_position": "LABORATORY DIRECTOR",
        "authorized_official_telephone_number": "972-755-1034",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Gwenelyn Cook
• Robbie Michelle Cook
• Morgan Goddard Cooper
• Core Neurodiagnostics, LLC
• Thomas Joseph Cornell, M.D.
• Cornerstone Labs LLC
• Nancy L Corsaro, L.AC.
• Melissa I Costner, MD
• Cottonwood Anesthesia Management, LLC
• Megan Couch

• Clinical Medical Laboratory in Addison, TX
• Providers in Addison, TX by specialty
• Clinical Medical Laboratory in Texas

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