billing code D3920: hemisection (including any root removal), not including root canal therapy Includes separation of a multi-rooted tooth into separate sections containing the root and the overlying portion of the crown. It may also include the removal of one or more of those sections. ISBN:1935201387#CDT 2011-2012 Current Dental Terminology, Chapter 1 hemisection (including any root removal), not including root canal therapy D3920 billing code for other endodontic procedures