2007 ICD-9-CM Procedure 96.21 Dilation of frontonasal duct 96.21 is a specific code that can be used to specify a procedure 96.21 contains 2 index entries View the full Volume 3 96.* hierarchy Index entries containing 96.21: Dilation frontonasal duct 96.21 Exploration -- see also Incision frontonasal duct 96.21