Gregory Douglas Dudzik, M.D.

Primary specialty

Addiction Medicine (Preventive Medicine) PhysicianTaxonomy code 2083A0300X

License

MD30603 Issued in ME

Practice address

22 Bramhall St
Portland, ME 04102-3134

Phone

(866) 600-2273

NPI assigned

Mar 24, 2015

Sex

Male

Sole proprietor

No

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

Enrolled in IL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1427155200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1789948800000",
    "number": "1588058978",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "18 MOLLISON WAY",
            "city": "LEWISTON",
            "state": "ME",
            "postal_code": "042405811",
            "telephone_number": "708-684-8000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "22 BRAMHALL ST",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "041023134",
            "telephone_number": "866-600-2273"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "15 York St",
            "address_purpose": "LOCATION",
            "city": "Biddeford",
            "state": "ME",
            "postal_code": "040055532",
            "country_code": "US",
            "telephone_number": "207-893-0386",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2300 Congress St",
            "address_purpose": "LOCATION",
            "city": "Portland",
            "state": "ME",
            "postal_code": "041021908",
            "country_code": "US",
            "telephone_number": "207-503-6746",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "86 Tandberg Trl",
            "address_purpose": "LOCATION",
            "city": "Windham",
            "state": "ME",
            "postal_code": "040625841",
            "country_code": "US",
            "telephone_number": "207-893-0386",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DUDZIK",
        "first_name": "GREGORY",
        "middle_name": "DOUGLAS",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-03-24",
        "last_updated": "2026-09-21",
        "certification_date": "2026-09-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2083A0300X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Addiction Medicine",
            "state": "ME",
            "license": "MD30603",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• David Duchin, PA-C
• Emma Katherine Dudley, MD
• Janice E. Dudley, PNP
• John A Dudley, PA-C
• Julie Ann Dudley, SLP
• Kristina Jane Duff
• Patricia Duffett, LCSW
• James W Duffey, CADC
• Hannah L Duffy, DPT
• Kara Duffy, PA-C

• Addiction Medicine (Preventive Medicine) Physician in Portland, ME
• Providers in Portland, ME by specialty
• Addiction Medicine (Preventive Medicine) Physician in Maine

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 21, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.