ICD-10 Code K55.032 – Diffuse acute (reversible) ischemia of large intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.032 – Diffuse acute (reversible) ischemia of large intestine
What it is
K55.032 identifies diffuse acute, reversible ischemia affecting the large intestine. It means the colon has reduced blood flow causing temporary injury, but the condition is documented as reversible.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include acute abdominal pain, bloody stool, and evidence of colonic ischemia on imaging, endoscopy, or surgical evaluation.
When to use this code
Use this code when the provider documents diffuse acute reversible ischemia of the large intestine, including ischemic colitis with diffuse involvement. It is appropriate when the record clearly links the ischemia to the large intestine and does not describe infarction or gangrene. Check documentation if the extent or acuity is unclear.
Do not use for
Do not use it for ischemia limited to the small intestine or for chronic mesenteric ischemia. Also avoid it when the record describes bowel infarction, necrosis, or another more specific intestinal ischemia code.
Coding tip
Match the code to the exact anatomic site and severity terms in the provider note; if “reversible” or “diffuse” is missing, check documentation.