Dr. Duan is a licensed Orthodontics in NY. Medical degree obtained from Boston University School of Dental Medicine. Completed residency training at Boston University. Currently practices at Duan Orthodontics (Duan Orthodontics), located at 10310 Greenwood Ave N, Seattle, NY 98133. Dr. Duan specializes in Braces Consultation, Crooked or Crowded Teeth, Clear Aligners / Invisalign Consultation and Orthodontic Consultation.. In addition to English, Dr. Duan speaks Mandarin and accepts new patients.