ICD-10 Code K57.53 – Diverticulitis of both small and large intestine without perforation or abscess with bleeding (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57.53 – Diverticulitis of both small and large intestine without perforation or abscess with bleeding
What it is
This code identifies diverticulitis affecting both the small and large intestine, with bleeding, but without perforation or abscess. Use it when documentation clearly states this specific combination.
Clinical signs
Typical findings include abdominal pain, tenderness, and evidence of gastrointestinal bleeding. Clinical features vary; refer to documentation for the exact location and whether perforation or abscess is absent.
When to use this code
Use K57.53 when the provider documents diverticulitis in both the small and large intestine and also notes bleeding. It is appropriate only if the record states there is no perforation and no abscess.
If the note mentions diverticulitis without bleeding, or identifies a different intestinal site, you should not assign this code. Check documentation when the anatomy or complication status is unclear.
Do not use for
Do not use this code for diverticulitis with perforation, abscess, or when bleeding is not documented. It is also wrong for diverticulosis without inflammation.
Coding tip
Confirm both the involved bowel segments and the absence of perforation or abscess before coding.