Get Directions 602-933-3366 Hours By appointment: Mon. - Fri.: 8 a.m. to 5 p.m.Sat. - Sun.: Closed Walk-in EKGs: Mon. - Fri.: 8 a.m. to 4 p.m. We make it easier for you to access the expertise of the Phoenix Children's cardiology team with our Tempe clinic. Visitor Parking Parking is available in front of the building.