2007 ICD-9-CM Procedure 31.44 Closed [endoscopic] biopsy of trachea 31.44 is a specific code that can be used to specify a procedure 31.44 contains 3 index entries View the full Volume 3 31.* hierarchy Index entries containing 31.44: Biopsy trachea 31.44 brush 31.44 closed (endoscopic) 31.44 open 31.45