The Clinic at Christie Walk-in visits are by appointment. Call 416-536-8000 or book online. Book Appointment Dr. Madlen O’Connor Walk-In Medicine Dr. Madlen O’Connor, MD, CCFP, is a family physician providing walk-in care at The Clinic at Christie. Outside the clinic, Dr. O’Connor loves baking, playing squash and walking the dog through Toronto’s ravines.