2007 ICD-9-CM Procedure 54.23 Biopsy of peritoneum 54.23 is a specific code that can be used to specify a procedure 54.23 contains 4 index entries View the full Volume 3 54.* hierarchy 54.23 also known as: Biopsy of: mesentery omentum peritoneal implant 54.23 excludes: closed biopsy of: omentum (54.24) peritoneum (54.24) Index entries containing 54.23: Biopsy mesentery 54.23 omentum open 54.23 peritoneal implant open 54.23 peritoneum open 54.23