Complex sentence: Also by law, The Surgeon General is appointed in the grade of Lieutenant General who serves as Commanding General, U.S. Army Medical Command (MEDCOM) and head of the U.S. Army Medical Department (AMEDD).
Split into simpler sentences: Also by law, The Surgeon General is appointed in the grade of Lieutenant General. By policy, The Surgeon General also serves as Commanding General, U.S. Army Medical Command (MEDCOM) and head of the U.S. Army Medical Department (AMEDD).