ICD-10 Code K90.2 – Blind loop syndrome, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K90.2 – Blind loop syndrome, not elsewhere classified
What it is
K90.2 identifies blind loop syndrome, a malabsorption condition caused by stasis in a bypassed or poorly draining intestinal segment. It can lead to bacterial overgrowth and impaired nutrient absorption.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include chronic diarrhea, bloating, weight loss, and signs of nutrient deficiency, especially when intestinal bypass or altered anatomy is present.
When to use this code
Use K90.2 when the record specifically documents blind loop syndrome or blind loop malabsorption. It may apply after surgical bypass or other anatomic changes that create a stagnant bowel segment. Code only when the provider links the symptoms to this diagnosis.
Do not use for
Do not use this code for general diarrhea, nonspecific malabsorption, or suspected bacterial overgrowth without documented blind loop syndrome. Check documentation if the cause is another intestinal disorder.
Coding tip
Confirm the operative history and provider’s final diagnosis before assigning K90.2.