K51 - Ulcerative colitis
K51.8 - Other ulcerative colitis
K51.80 - Other ulcerative colitis without complications
K51.81 - Other ulcerative colitis with complications
K51.811 - Other ulcerative colitis with rectal bleeding
K51.812 - Other ulcerative colitis with intestinal obstruction
K51.813 - Other ulcerative colitis with fistula
K51.814 - Other ulcerative colitis with abscess
K51.818 - Other ulcerative colitis with other complication
K51.819 - Other ulcerative colitis with unspecified complications