Thomas Joseph McMahon, PHD

Primary specialty

Clinical Child & Adolescent PsychologistTaxonomy code 103TC2200X

License

001969 Issued in CT

Practice address

34 Park St
Connecticut Mental Health Center
New Haven, CT 06519

Phone

(203) 974-7417

Fax

(203) 974-7413

NPI assigned

May 25, 2007

Last updated

Sep 11, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

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

{
    "created_epoch": "1180051200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1174734438",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "34 PARK ST",
            "address_2": "CONNECTICUT MENTAL HEALTH CENTER OFFICE OF CARE MANAGEM",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "06519",
            "telephone_number": "203-974-7417",
            "fax_number": "203-974-7413"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "34 PARK ST",
            "address_2": "CONNECTICUT MENTAL HEALTH CENTER",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "06519",
            "telephone_number": "203-974-7417",
            "fax_number": "203-974-7413"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MCMAHON",
        "first_name": "THOMAS",
        "middle_name": "JOSEPH",
        "credential": "PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-25",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "CT",
            "license": "001969",
            "primary": false
        },
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "CT",
            "license": "001969",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kathleen Mary McMahon-Brown, MSN, APRN
• David McMahon, BC-HIS
• Jada Simone McMahon, MD
• Jennifer McMahon
• Jonathan McMahon, DO
• Dayna McManus, PHARMD
• Leah McManus
• Nicole Renee McManus, APRN
• Crystal L McMichael
• Iris Fraude McMillan, PHD

• Clinical Child & Adolescent Psychologist in New Haven, CT
• Providers in New Haven, CT by specialty
• Clinical Child & Adolescent Psychologist 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.