2007 ICD-9-CM Procedure 18.19 Other diagnostic procedures on external ear 18.19 is a specific code that can be used to specify a procedure 18.19 contains 1 index entry View the full Volume 3 18.* hierarchy 18.19 excludes: microscopic examination of specimen from ear (90.31-90.39) Index entries containing 18.19: Procedure -- see also specific procedure diagnostic NEC ear external 18.19