ICD-10 Code K63.2 – Fistula of intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K63.2 – Fistula of intestine
What it is
K63.2 identifies an abnormal passage between the intestine and another organ or the skin. It indicates an intestinal fistula, which can allow bowel contents to drain in an unintended way.
Clinical signs
Clinical features vary; refer to documentation. Common findings include persistent drainage, recurrent infection, abdominal pain, or evidence of abnormal communication on imaging or exam.
When to use this code
Use K63.2 when the provider documents a fistula involving the intestine, such as an enteric or enterocutaneous fistula. Code it when the record confirms the intestinal fistula as the diagnosis being managed. Check documentation if the source, tract, or associated condition is unclear.
Do not use for
Do not use this code for non-intestinal fistulas or for suspected fistula without confirmation. If the documentation names a specific postoperative complication or another digestive disorder instead, code that condition as directed.
Coding tip
Query for the fistula’s origin, site, and whether it is postoperative, because those details can affect the most accurate code assignment.