2007 ICD-9-CM Procedure 46.2 Ileostomy (il-ee-AHS-toe-mee) An opening into the ileum, part of the small intestine, from the outside of the body. An ileostomy provides a new path for waste material to leave the body after part of the intestine has been removed. Surgical creation of an external opening into the ILEUM for fecal diversion or drainage. This replacement for the RECTUM is usually created in patients with severe INFLAMMATORY BOWEL DISEASES. Loop (continent) or tube (incontinent) procedures are most often employed. 46.2 is a non-specific code that should not be used to specify a procedure View the full Volume 3 46.* hierarchy Code also any synchronous resection (45.34, 45.61-45.63) 46.2 excludes: loop ileostomy (46.01)