In simple words: This code indicates a type of ulcerative colitis, a long-term inflammatory condition affecting the large intestine, with a contained pocket of infection (abscess) as a complication.

Other ulcerative colitis with abscess. This code specifies a type of ulcerative colitis, a chronic inflammatory bowel disease, with the presence of an abscess as a complication.

Example 1: A patient with a history of ulcerative colitis presents with abdominal pain, fever, and leukocytosis. Imaging reveals an abscess in the perianal area. The code K51.814 is assigned., A patient undergoing treatment for ulcerative colitis develops a liver abscess. Imaging confirms the diagnosis. The code K51.814 would be used, along with a code specifying the liver abscess., A patient with a long history of ulcerative colitis develops an intra-abdominal abscess following a surgical resection of a portion of their colon. Code K51.814 is used to indicate the underlying colitis and the associated abscess complication.

Documentation should include details about the ulcerative colitis, including location and severity, as well as evidence supporting the presence of an abscess. Imaging reports, laboratory results, and physical examination findings are crucial.