Patient Portal Assistance is available, Monday – Friday 8am – 5pm, by calling (254) 716-3040. ... Waco Cardiology Associates 7125 New Sanger Avenue, Suite A Waco, Texas 76712 (254) 399-5400 Toll-Free (866) 922-3627 Hours: 7:30 am - 5:30 pm, Monday through Friday..