ICD-10 Code K57.13 – Diverticulitis of small intestine without perforation or abscess with bleeding (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.13 – Diverticulitis of small intestine without perforation or abscess with bleeding
What it is
K57.13 identifies diverticulitis in the small intestine when there is bleeding, but no perforation or abscess. Use it for documented inflammation of small-bowel diverticula with hemorrhage.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include abdominal pain, gastrointestinal bleeding, and imaging or endoscopic evidence of inflamed small-intestinal diverticula without perforation or abscess.
When to use this code
Use this code when the record clearly states small-intestinal diverticulitis with bleeding and specifically notes no perforation or abscess. It may also fit when the provider documents hemorrhagic diverticulitis of the small bowel. Check documentation if the site or complication is unclear.
Do not use for
Do not use this code for diverticulitis with perforation, abscess, or bleeding from a different gastrointestinal source. Also avoid it if the documentation only says diverticulosis or nonspecific abdominal pain.
Coding tip
Verify the anatomic site and complication wording exactly; if bleeding is not linked to small-intestinal diverticulitis, do not assign K57.13.