Relating to Incision (38300–38382): Using the CPT code book, identify the main term for the following scenario: POSTOPERATIVE DIAGNOSIS: Abscess of lymph node PROCEDURE PERFORMED: Incision and Drainage of lymph node; simple An incision was made to drain the pus and a drain was inserted through the skin to keep the fluid from collection again. List the main term used to locate information in the Alphabetic Index .