K51.3 - Ulcerative (chronic) rectosigmoiditis
K51.31 - Ulcerative (chronic) rectosigmoiditis with complications
K51.311 - Ulcerative (chronic) rectosigmoiditis with rectal bleeding
K51.312 - Ulcerative (chronic) rectosigmoiditis with intestinal obstruction
K51.313 - Ulcerative (chronic) rectosigmoiditis with fistula
K51.314 - Ulcerative (chronic) rectosigmoiditis with abscess
K51.318 - Ulcerative (chronic) rectosigmoiditis with other complication
K51.319 - Ulcerative (chronic) rectosigmoiditis with unspecified complications