N80.CNon-Billable (Header)Endometriosis of the abdomenChild CodesN80.C0Endometriosis of the abdomen, unspecifiedN80.C1Endometriosis of the anterior abdominal wallN80.C2Endometriosis of the umbilicusN80.C3Endometriosis of the inguinal canalN80.C4Endometriosis of extra-pelvic abdominal peritoneumN80.C9Endometriosis of other site of abdomenCode Hierarchy└N80Endometriosis└N80.CEndometriosis of the abdomen└N80.CEndometriosis of the abdomen