MyChart Online Patient Portal. Share . CMU Health > Patients > MyChart. ... contact our office via phone or live chat, or call the MyChart Patient Support Line at 989-583-0488, Monday through Friday during normal business hours ... Saginaw 1000 Houghton Ave. Saginaw, MI 48602 989-746-7500 Driving Directions. Mount Pleasant 600 East Preston St ....