George Davis Gammon, MD

Primary specialty

Addiction Medicine (Psychiatry & Neurology) PhysicianTaxonomy code 2084A0401X

License

020807 Issued in CT

Practice address

33 Edgehill Ter
Hamden, CT 06517-4017

Phone

(203) 865-6540

NPI assigned

Mar 23, 2007

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1174608000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1053438267",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "33 EDGEHILL TER",
            "city": "HAMDEN",
            "state": "CT",
            "postal_code": "065174017",
            "telephone_number": "203-865-6540"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "33 EDGEHILL TER",
            "city": "HAMDEN",
            "state": "CT",
            "postal_code": "065174017",
            "telephone_number": "203-865-6540"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GAMMON",
        "first_name": "GEORGE",
        "middle_name": "DAVIS",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-03-23",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084A0401X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Addiction Medicine",
            "state": "CT",
            "license": "020807",
            "primary": true
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CT",
            "license": "020807",
            "primary": false
        },
        {
            "code": "2084P0802X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Addiction Psychiatry",
            "state": "CT",
            "license": "020807",
            "primary": false
        },
        {
            "code": "2084P0804X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Child & Adolescent Psychiatry",
            "state": "CT",
            "license": "020807",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Beth Gaillard, LCSW
• Karen Galvin, PT/MPT
• Raymond J. Gambardella, DMD
• Taires Gamble
• Gambrell Behavioral Health Services, LLC
• Shanna M Gannon, PA-C
• Julio Cesar Garcia
• Ashlei Garrett, MS,LPC-A
• Justin Garrison, PA-C
• Olivia Garvey-Blackwell

• Addiction Medicine (Psychiatry & Neurology) Physician in Hamden, CT
• Providers in Hamden, CT by specialty
• Addiction Medicine (Psychiatry & Neurology) Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.