GSG West LLC

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

Legal business name

GSG WEST LLC

Practice address

721 Wellness Way Ste 100
Lawrenceville, GA 30046-3304

Phone

(770) 995-3113

Fax

(770) 277-2930

NPI assigned

Jan 8, 2026

Organization subpart

No

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

Authorized official

Name

William Gordon Tanner, MDNPI 1114911294

Title

Owner

Phone

(770) 995-3113

Specialties & licenses 1

Addresses

Practitioners 1

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

• William Gordon Tanner Jr., M.D.

  • Gastroenterology Physician
  • Lawrenceville, GA
  • NPI 1114911294

  Gastroenterology

  NPD Authorized official

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

{
    "created_epoch": "1767830400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1767830400000",
    "number": "1174480321",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "721 WELLNESS WAY STE 100",
            "city": "LAWRENCEVILLE",
            "state": "GA",
            "postal_code": "300463304",
            "telephone_number": "770-995-3113",
            "fax_number": "770-277-2930"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "721 WELLNESS WAY STE 100",
            "city": "LAWRENCEVILLE",
            "state": "GA",
            "postal_code": "300463304",
            "telephone_number": "770-995-3113",
            "fax_number": "770-277-2930"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "GSG WEST LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-01-08",
        "last_updated": "2026-01-08",
        "certification_date": "2026-01-08",
        "status": "A",
        "authorized_official_last_name": "TANNER",
        "authorized_official_first_name": "WILLIAM",
        "authorized_official_middle_name": "GORDON",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "770-995-3113",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Gastroenterology",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ashlee Elizabeth Groover
• Katrina Gross
• Anna Grove, PA-C
• Kendall L Gruenenfelder, M.ED, CCC-SLP
• GSG Anesthesia, LLC
• GSH, Inc.
• Allison Marie Guagliardo
• Guard 9 LLC
• Myriante Manefouet Guedje
• Chelsea Rebecca Guerin, M.ED.

• All providers in Lawrenceville, GA
• Gastroenterology Physician in Georgia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 8, 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.