To register online at Medical City Healthcare, sign in using your MyHealthONE account. Select a facility Medical City Alliance Medical City Arlington Medical City Dallas Medical City Denton Medical City Fort Worth Medical City Frisco Medical City Heart Hospital Medical City Las Colinas Medical City Lewisville Medical City McKinney Medical City North Hills Medical City Plano Medical City Spine Hospital Medical City Weatherford Create your account or Sign in Download the app today to manage all parts of your health easily and securely. Having trouble? Please contact us at: