Christie Sylvester, MD Christie Sylvester, MD, is a psychiatrist with AHN Behavioral Health Institute, specializing in child, adolescent, and adult psychiatry. Her clinical interests include OCD spectrum disorders, anxiety disorders, and eating disorders. She went to medical school at Saba University School of Medicine in Saba, Netherlands. Upon completion of medical school, she did her residency and fellowship in child and adolescent psychiatry at Western Psychiatric Institute in Pittsburgh, Pennsylvania. Dr. Sylvester is certified by the American Board of Adult Psychiatry and the American Board of Child and Adolescent Psychiatry. She welcomes patients ages 5 to 30.