ICD-10 Code K55.059 – Acute (reversible) ischemia of intestine, part and extent unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.059 – Acute (reversible) ischemia of intestine, part and extent unspecified
What it is
K55.059 identifies acute, potentially reversible reduced blood flow to the intestine when the affected bowel segment is not specified. Use it when documentation states intestinal ischemia without further detail on location or extent.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include acute abdominal pain and signs of intestinal ischemia on imaging, endoscopy, or operative assessment.
When to use this code
Use this code when the provider documents acute reversible ischemia of the intestine and does not name the small bowel, colon, or another specific segment. It also fits cases where the record confirms ischemia but leaves the extent unspecified. Check documentation if the note suggests infarction, necrosis, or another diagnosis.
Do not use for
Do not use it for chronic mesenteric ischemia, bowel infarction, or intestinal necrosis. If the documentation specifies a different bowel segment or a nonreversible process, choose the more precise code.
Coding tip
Query for the exact bowel location and whether the ischemia is reversible before assigning K55.059.