Current Dental Terminology (CDT) is a code set with descriptive terms developed and updated by the American Dental Association (ADA) for reporting dental services and procedures to dental benefits plans. [1][2][3] Prior to 2010 many of the codes were published by CMS as HCPCS D-codes under arrangement with the ADA. Ownership and copyright of CDT remained with the ADA. [4][5] In 2010 the ADA ended the CMS distribution of CDT codes, which can now be purchased from the ADA.[6]