2007 ICD-9-CM Procedure 18.31 Radical excision of lesion of external ear 18.31 is a specific code that can be used to specify a procedure 18.31 contains 5 index entries View the full Volume 3 18.* hierarchy 18.31 excludes: radical excision of preauricular sinus (18.21) Index entries containing 18.31: Excision ear, external (complete) NEC 18.39 partial 18.29 radical 18.31 lesion (local) auditory canal or meatus, external 18.29 radical 18.31 auricle, ear 18.29 radical 18.31 ear, external 18.29 radical 18.31 pinna 18.29 radical 18.31