ICD-10 Code K57.1 – Diverticular disease of small intestine without perforation or abscess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.1 – Diverticular disease of small intestine without perforation or abscess
What it is
This code identifies diverticular disease involving the small intestine when there is no perforation or abscess. Use it for documented small-bowel diverticulosis or diverticulitis that remains uncomplicated.
Clinical signs
Clinical features vary; refer to documentation. Patients may have abdominal pain, bloating, or nonspecific gastrointestinal symptoms, and imaging or endoscopy may confirm small-intestinal diverticula without perforation or abscess.
When to use this code
Use K57.1 when the record clearly states diverticular disease of the small intestine and there is no mention of perforation or abscess. It also fits cases described as uncomplicated small-bowel diverticular disease or diverticulitis. If the note is unclear about location or complications, check documentation.
Do not use for
Do not use this code for colonic diverticular disease, perforated diverticulum, or diverticular abscess. If the site or complication is different, choose the more specific documented code.
Coding tip
Confirm both the intestinal site and the absence of perforation or abscess before assigning K57.1.