ICD-10 Code K57.91 – Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.91 – Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding
What it is
This code identifies diverticulosis in an unspecified part of the intestine when bleeding is present, but there is no perforation or abscess. Use it when the record documents diverticular bleeding without a specified bowel segment.
Clinical signs
Typical findings include gastrointestinal bleeding such as hematochezia or melena, with diverticula noted on imaging, endoscopy, or prior history. Clinical features vary; refer to documentation.
When to use this code
Use K57.91 when the provider documents diverticulosis with bleeding and does not specify the intestinal location. It also fits when the chart excludes perforation or abscess. If the note identifies diverticulitis instead, or names a specific site, code accordingly.
Do not use for
Do not use this code for diverticulitis, perforation, abscess, or diverticulosis without bleeding. Check documentation if the bleeding source is unclear or another gastrointestinal diagnosis is recorded.
Coding tip
Verify that bleeding is linked to diverticulosis and that no more specific bowel segment is documented.