ICD-10 Code K55.1 – Chronic vascular disorders of intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.1 – Chronic vascular disorders of intestine
What it is
K55.1 identifies chronic blood flow problems affecting the intestine. It is used when reduced intestinal perfusion causes ongoing disease rather than an acute event.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include recurrent postprandial abdominal pain, weight loss, or other signs of chronic intestinal ischemia.
When to use this code
Use K55.1 when the provider documents chronic vascular insufficiency, chronic intestinal ischemia, or a chronic mesenteric circulatory disorder affecting the bowel. Apply it when the condition is established and not described as acute. Check documentation if the record only notes abdominal pain without a vascular diagnosis.
Do not use for
Do not use this code for acute intestinal ischemia or nonspecific abdominal pain without documented vascular disease. Check documentation if the chart describes another gastrointestinal disorder as the primary cause.
Coding tip
Assign K55.1 only when the record clearly supports a chronic vascular intestinal disorder, and query the provider if the term is vague.