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2025 ICD-10-CM code K50.813

Crohn's disease of both small and large intestine with fistula.

Use additional codes to identify manifestations such as pyoderma gangrenosum (L88).

Medical necessity for the diagnosis and treatment of Crohn's disease with fistula is established by the presence of active disease and related complications. The fistula itself represents a significant complication requiring intervention to prevent further morbidity.

Diagnosis and management of Crohn's disease, including treatment of fistulas. This may involve medical management (e.g., medications to reduce inflammation, antibiotics), surgical intervention (e.g., resection of affected bowel, fistula repair), or a combination of both.

In simple words: This code indicates Crohn's disease affecting both the small and large intestines with an abnormal connection (fistula).

Crohn's disease affecting both the small and large intestines, characterized by chronic inflammation and the presence of one or more fistulas.A fistula is an abnormal connection between two body parts, such as between different sections of the intestine, or between the intestine and another organ (bladder, vagina, skin).

Example 1: A patient with a history of Crohn's disease presents with abdominal pain, fever, and drainage near the anus. Imaging reveals inflammation in both the small and large intestines and a fistula between the rectum and the skin., A patient with Crohn's disease involving both the small and large intestine develops a fistula between the small intestine and the bladder, leading to recurrent urinary tract infections. , A patient undergoing treatment for Crohn's disease is found to have a fistula between loops of small bowel during a colonoscopy.

Documentation should include: Location and type of fistula (e.g., enterocutaneous, enteroenteric, enterovesical), Signs and symptoms related to the fistula (e.g., pain, drainage, infection), Imaging or procedural findings confirming the presence of the fistula (e.g., CT scan, MRI, colonoscopy),Medical history of Crohn's disease involving both small and large bowel.

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