To access the patient portal, go to myCTCA.com. Scheduling phone numbers. CTCA patients can reach out to our hospitals directly with questions about schedules and appointments. To make, change or cancel an appointment at our hospitals, call: CTCA Atlanta: 770-400-7050. CTCA Chicago: 800-458-1975 or 847-872-7581. CTCA Phoenix: 623-207-3306.