ICD-10 Code K57.9 – Diverticular disease of intestine, part unspecified, without perforation or abscess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.9 – Diverticular disease of intestine, part unspecified, without perforation or abscess
What it is
K57.9 identifies diverticular disease affecting the intestine when the exact segment is not documented and there is no perforation or abscess. Use it for uncomplicated diverticular disease with unspecified location.
Clinical signs
Clinical features vary; refer to documentation. Diverticular disease may be noted on imaging, colonoscopy, or prior history, often with abdominal discomfort or bowel habit changes, but this code depends on the documented diagnosis.
When to use this code
Use K57.9 when the provider documents diverticular disease of the intestine but does not specify the site, such as colon or small intestine. It also fits when the record states no perforation or abscess. If the note names a more specific diverticular condition, code that instead.
Do not use for
Do not use this code for diverticulitis with perforation or abscess, or when the affected intestinal part is documented more specifically. Check documentation if the record describes a different diverticular subtype.
Coding tip
Always look for the anatomic site and any complication statements before assigning K57.9.