billing code D3222: partial pulpotomy for apexogenesis - permanent tooth with incomplete root development partial pulpotomy for apexogenesis - permanent tooth with incomplete root development D3222 Removal of a portion of the pulp and application of a medicament with the aim of maintaining the vitality of the remaining portion to encourage continued physiological development and formation of the root. This procedure is not to be construed as the first stage of root canal therapy. ISBN:1935201387#CDT 2011-2012 Current Dental Terminology, Chapter 1 billing code for pulpotomy