ICD-10 Code K55.02 – Acute infarction of small intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.02 – Acute infarction of small intestine
What it is
K55.02 identifies an acute loss of blood supply causing tissue death in the small intestine. Use it when documentation clearly states acute small bowel infarction or equivalent wording.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include sudden severe abdominal pain, signs of bowel ischemia, and imaging or operative evidence of infarction.
When to use this code
Use this code when the provider documents acute infarction of the small intestine, including acute ischemic necrosis of small bowel. It may also fit when operative, radiologic, or pathology reports confirm acute small intestinal infarction. Check documentation if the note only mentions abdominal pain or mesenteric ischemia without infarction.
Do not use for
Do not use K55.02 for chronic intestinal ischemia, nonspecific abdominal pain, or mesenteric ischemia without documented infarction. If the record is unclear, check documentation.
Coding tip
Code K55.02 only when “acute infarction” is explicitly documented or clearly supported by the record.