ICD-10 Code K57.80 – Diverticulitis of intestine, part unspecified, with perforation and abscess without bleeding (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.80 – Diverticulitis of intestine, part unspecified, with perforation and abscess without bleeding
What it is
K57.80 identifies diverticulitis affecting an unspecified part of the intestine when there is both perforation and abscess, and no bleeding is documented. Use it when the record confirms complicated diverticulitis but does not name the bowel segment.
Clinical signs
Typical findings include abdominal pain, localized tenderness, fever, and evidence of an abscess or perforation on imaging or in operative notes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents diverticulitis with perforation and abscess, but the affected intestinal site is not specified. It also fits cases where imaging or surgery confirms a complicated diverticular process without bleeding. Check documentation if the record names a specific colon segment or mentions hemorrhage.
Do not use for
Do not use K57.80 if the chart identifies bleeding, because this code is for diverticulitis without bleeding. Also avoid it when the site is known and a more specific diverticulitis code applies.
Coding tip
Capture the exact anatomic site and whether bleeding is present before assigning this code.