Dr. Syed Yasser Ammar Haider Dr. Syed Yasser Ammar Haider Suite 406 Markham Stouffville Health Centre 377 Church Street Markham ON L6B 1A1 Phone: (905) 472-2755 Fax: (905) 472-3455 Markham Surgeons Ontario Surgeons Joint Replacements Surgical Wait Times Spinal Clinics National Surgeon Directory Canadian Surgeons Abroad Non-Surgical Treatment Private Surgery Surgical Wait Times Joint Replacements Spinal Clinics