ICD-10 Code K55.05 – Acute (reversible) ischemia of intestine, part unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.05 – Acute (reversible) ischemia of intestine, part unspecified
What it is
K55.05 identifies acute, potentially reversible loss of blood flow to part of the intestine when the affected segment is not specified. Use it for ischemic bowel injury documented as acute and reversible.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include sudden abdominal pain, tenderness, and evidence of intestinal ischemia on imaging or operative evaluation, with improvement expected if blood flow is restored.
When to use this code
Use K55.05 when the provider documents acute reversible intestinal ischemia and does not identify the exact bowel segment. It is appropriate when the record supports ischemia but does not describe infarction or a more specific intestinal location. Check documentation if the site is unclear.
Do not use for
Do not use this code for chronic mesenteric ischemia, intestinal infarction, or nonspecific abdominal pain without documented ischemia. If the affected bowel segment is specified, code to the more specific option.
Coding tip
Confirm that the note says “acute” or “reversible” ischemia and that no more specific bowel site is documented before assigning K55.05.