ICD-10 Code K57 – Diverticular disease of intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K57 – Diverticular disease of intestine
What it is
K57 identifies diverticular disease affecting the intestine, most often the colon. It includes conditions where small pouches form in the bowel wall, with or without inflammation or complications.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include lower abdominal pain, bowel habit changes, or tenderness, and some cases are discovered incidentally on imaging or colon evaluation.
When to use this code
Use K57 when the record documents diverticular disease of the intestine and no more specific subcode is available. It may apply to uncomplicated diverticulosis, diverticulitis, or other diverticular conditions when the chart supports the diagnosis. Confirm the site and any complications before coding.
Do not use for
Do not use this code for nonspecific abdominal pain without documented diverticular disease. If the provider documents a different intestinal disorder or a more specific diverticular code, code that condition instead.
Coding tip
Check the note for site, acuity, and complications, because K57 has more specific options when documentation is detailed.