ICD-10 Code K57.51 – Diverticulosis of both small and large intestine without perforation or abscess with bleeding (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.51 – Diverticulosis of both small and large intestine without perforation or abscess with bleeding
What it is
K57.51 identifies diverticulosis affecting both the small and large intestine when bleeding is present, but there is no perforation or abscess. Use it when the record documents diverticula with hemorrhage and no complicated infection.
Clinical signs
Typical findings include gastrointestinal bleeding, such as hematochezia or melena, with evidence of diverticulosis in both bowel segments. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents diverticulosis of both the small and large intestine and specifically notes bleeding. The record should also show that perforation and abscess are absent. If the site or complication is unclear, check documentation before coding.
Do not use for
Do not use K57.51 if bleeding is not documented, or if the chart describes perforation, abscess, or another diverticular complication. Do not assign it when only one intestinal site is involved.
Coding tip
Match the anatomic site and complication exactly; bleeding changes the code, so confirm both location and absence of perforation or abscess.