K91.850
ICD-10-CMThis code identifies inflammation of an ileal pouch (or J-pouch), which is surgically created from the small intestine to store stool after a total colectomy, typically for ulcerative colitis or familial adenomatous polyposis. Pouchitis can manifest with symptoms such as increased stool frequency, urgency, abdominal pain, and sometimes fever or bleeding.
Use this code for patients diagnosed with inflammation of their ileal pouch. Documentation should clearly state "pouchitis" or describe the inflammatory process within the surgically created pouch, often confirmed by endoscopy and biopsy. This code is appropriate for both acute and chronic presentations of pouchitis.
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