2007 ICD-9-CM Procedure 44.21 Dilation of pylorus by incision 44.21 is a specific code that can be used to specify a procedure 44.21 contains 3 index entries View the full Volume 3 44.* hierarchy Index entries containing 44.21: Dilation pylorus by incision 44.21 sphincter pylorus, endoscopic 44.22 by incision 44.21 Pyloroplasty (Finney) (Heineke-Mikulicz) 44.29 dilation, endoscopic 44.22 by incision 44.21