I received my certification from the Norton School of Lymphatic Therapy (48 course hours) in 2007, and repeated my certification at the Swedish Institute College of Continuing Education (174 course hours) in 2016.
WARNING: Only a licensed medical professional can administer Manual Lymphatic Drainage (ie. Licensed Massage Therapist, Occupational or Physical Therapist). It is illegal for someone to open your incisions and push out fluid. That is NOT Manual Lymphatic Drainage.