2007 ICD-9-CM Procedure 20.93 Repair of oval and round windows 20.93 is a specific code that can be used to specify a procedure 20.93 contains 3 index entries View the full Volume 3 20.* hierarchy 20.93 also known as: Closure of fistula: oval window perilymph round window Index entries containing 20.93: Closure -- see also Repair fistula oval window (ear) 20.93 perilymph 20.93 round window 20.93