2007 ICD-9-CM Procedure 42.21 Operative esophagoscopy by incision 42.21 is a specific code that can be used to specify a procedure 42.21 contains 3 index entries View the full Volume 3 42.* hierarchy Index entries containing 42.21: Endoscopy esophagus NEC 42.23 transabdominal (operative) 42.21 Esophagoscopy NEC 42.23 by incision (operative) 42.21 transabdominal (operative) 42.21