ICD-10 Code K55.04 – Acute infarction of large intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.04 – Acute infarction of large intestine
What it is
Acute infarction of the large intestine means sudden loss of blood flow causing tissue death in part of the colon. It is a serious ischemic bowel condition that requires prompt clinical attention.
Clinical signs
Findings often include acute abdominal pain, tenderness, and signs of bowel ischemia. Clinical features vary; refer to documentation for evidence of colonic infarction, ischemia, or necrosis.
When to use this code
Use K55.04 when the record clearly documents acute infarction of the large intestine, including ischemic necrosis of the colon. Code it when the provider links the diagnosis to the large intestine and not to another bowel segment. Check documentation if the site or acuity is unclear.
Do not use for
Do not use this code for nonspecific abdominal pain, chronic intestinal ischemia, or infarction of the small intestine. If the documentation does not confirm acute large-bowel infarction, check documentation.
Coding tip
Confirm both acuity and anatomic site in the note before assigning K55.04.