ICD-10 Code K55.042 – Diffuse Acute Infarction of Large Intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.042 – Diffuse acute infarction of large intestine
What it is
K55.042 identifies diffuse acute infarction of the large intestine, meaning widespread sudden loss of blood flow causing tissue death in the colon. Use it when documentation clearly states diffuse infarction of the large bowel.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include acute abdominal pain, tenderness, bloody stool, or signs of bowel ischemia, but the record must support infarction of the large intestine.
When to use this code
Use this code when the provider documents diffuse acute infarction involving the large intestine, including colon ischemia with infarction affecting more than one segment. It is appropriate when the record specifies acute infarction and the site is the large intestine. Check documentation if the extent or location is unclear.
Do not use for
Do not use this code for ischemia without infarction, localized bowel infarction, or small intestine involvement. If the note is nonspecific or conflicts with the diagnosis, check documentation.
Coding tip
Code only when the provider explicitly documents diffuse acute infarction of the large intestine; otherwise, query for clarification.