ICD-10 Code K91.858 – Other complications of intestinal pouch (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K91.858 – Other complications of intestinal pouch
What it is
K91.858 identifies other complications involving an intestinal pouch, usually a surgically created reservoir after bowel surgery. Use it when the chart documents a pouch-related problem that does not fit a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include pouch dysfunction, pain, altered bowel habits, inflammation, or other postoperative pouch-related complications.
When to use this code
Use this code when the provider links the current condition to an intestinal pouch and describes it as a complication. It is appropriate when the record is specific enough to show a pouch problem but not specific enough for a narrower code.
Code from the operative note, progress note, or discharge summary if the complication is clearly documented. Check documentation if the cause, type, or timing of the pouch complication is unclear.
Do not use for
Do not use this code for routine postoperative follow-up without a complication, or for conditions unrelated to an intestinal pouch. If a more specific pouch complication is documented, code that instead.
Coding tip
Look for the provider’s exact wording and confirm the complication is tied to the pouch, not simply to prior bowel surgery.