Thursday, October 29, 2026

K50.013 designates Crohn's disease of the small intestine complicated by a fistula. Enterocutaneous, enterovaginal, and enteroenteric fistulas frequently arise from deep transmural inflammation characteristic of regional enteritis. Accurate coding requires clear documentation that directly connects the fistulous tract to the small bowel involvement. Using this combination code ensures the specific site and manifestation are correctly captured without unbundling.