In simple words: This code describes a type of inflammatory bowel disease called Crohn's disease.It specifically indicates that the disease is affecting the large intestine (colon) and that there's an abnormal connection, called a fistula, between the intestine and another part of the body.

This ICD-10-CM code, K50.113, specifies Crohn's disease localized to the large intestine and further characterized by the presence of a fistula.A fistula is an abnormal connection between two organs or vessels. In the context of Crohn's disease, this can involve the formation of an abnormal passage between the intestine and another structure, such as the skin, bladder, or vagina.The code necessitates documentation supporting the diagnosis of Crohn's disease in the large intestine and the existence of a fistula.

Example 1: A 35-year-old female patient presents with abdominal pain, weight loss, and diarrhea. Colonoscopy reveals transmural inflammation consistent with Crohn's disease involving the sigmoid colon, along with a perianal fistula.Code K50.113 is used., A 40-year-old male patient has a history of Crohn's disease of the large intestine. He experiences a new episode of abdominal pain and fever.Imaging studies reveal an abscess and a fistula connecting the ileum and the bladder. Code K50.113 is used. Additional codes for abscess and the specific fistula location would be included., A 60-year-old patient with a known diagnosis of Crohn's disease presents for follow-up. A recent CT scan shows a newly formed fistula tract between the colon and the skin. Code K50.113 is appropriate.

Complete history and physical examination. Colonoscopy report with histological findings. Imaging studies (e.g., CT, MRI) confirming the presence of a fistula and location. Laboratory results relevant to the diagnosis and management of Crohn's disease.Any surgical reports if a procedure was performed to manage the fistula.

** Accurate coding of K50.113 requires precise documentation of the location of the Crohn's disease and the presence of a fistula.The type and location of the fistula should be specified when possible.