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