K55 Vascular disorders of intestine

K56 Paralytic ileus and intestinal obstruction without hernia

K57 Diverticular disease of intestine

K58 Irritable bowel syndrome

K59 Other function intestinal disorders

K60 Fissure and fistula of anal and rectal regions

K61 Abscess of anal and rectal regions

K62 Other diseases of anus and rectum

K63 Other diseases of intestine