Crohn's disease of large intestine with fistula

This code identifies a chronic inflammatory bowel disease specifically affecting the large intestine, characterized by transmural inflammation and the formation of a fistula. A fistula is an abnormal connection or tract that develops between two organs, or between an organ and the skin, due to the inflammatory process.

Apply this code when documentation explicitly states Crohn's disease localized to the large intestine, and a fistula is present as a complication. This typically includes findings from colonoscopy, imaging studies (e.g., MRI, CT scan), or surgical reports confirming both the location of Crohn's and the presence of a fistula.

• Always confirm the specific anatomical site of Crohn's disease (large intestine) and the presence of a fistula.
• Distinguish from Crohn's disease of other sites or without fistula, as separate codes exist.
• Code any associated complications of the fistula (e.g., abscess, obstruction) separately, if documented.