Diverticulitis and Diverticulosis ICD-10-CM codes
ICD-10-CM codes for diverticulitis and diverticulosis of the small and large intestine, with and without perforation, abscess, and bleeding.
34 codes, 25 billable. FY2027, valid from October 1, 2026. In chapter 11: Diseases of the Digestive System.
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How to code Diverticulitis and Diverticulosis
Category K57 is organized by site and by whether perforation and abscess are present. The fourth character pairs are K57.0 and K57.1 for the small intestine, K57.2 and K57.3 for the large intestine, K57.4 and K57.5 for both, and K57.8 and K57.9 for an unspecified part. The first code of each pair (K57.0, K57.2, K57.4, K57.8) means with perforation and abscess; the second means without.
The fifth character distinguishes diverticulosis from diverticulitis and reports bleeding: 0 diverticulosis without bleeding, 1 diverticulosis with bleeding, 2 diverticulitis without bleeding, and 3 diverticulitis with bleeding. Uncomplicated diverticulitis of the colon is K57.32, colonic diverticulosis found on colonoscopy is K57.30, and a diverticular bleed is K57.31 or K57.33. Diverticulitis with no site documented indexes to K57.92, so confirm whether the provider specified the colon.
Bleeding is built into the code, so K92.2 is not added for diverticular hemorrhage. For perforation with abscess or peritonitis, use the with-perforation-and-abscess code (K57.20 for the colon) and follow the code-also note for peritonitis (K65.-), reporting K65.0 when generalized peritonitis is documented separately.
All Diverticulitis and Diverticulosis codes
- K57Diverticular disease of intestine
- K57.0Diverticulitis of small intestine with perforation and abscess
- K57.00Diverticulitis of small intestine with perforation and abscess without bleeding
- K57.01Diverticulitis of small intestine with perforation and abscess with bleeding
- K57.1Diverticular disease of small intestine without perforation or abscess
- K57.10Diverticulosis of small intestine without perforation or abscess without bleeding
- K57.11Diverticulosis of small intestine without perforation or abscess with bleeding
- K57.12Diverticulitis of small intestine without perforation or abscess without bleeding
- K57.13Diverticulitis of small intestine without perforation or abscess with bleeding
- K57.2Diverticulitis of large intestine with perforation and abscess
- K57.20Diverticulitis of large intestine with perforation and abscess without bleeding
- K57.21Diverticulitis of large intestine with perforation and abscess with bleeding
- K57.3Diverticular disease of large intestine without perforation or abscess
- K57.30Diverticulosis of large intestine without perforation or abscess without bleeding
- K57.31Diverticulosis of large intestine without perforation or abscess with bleeding
- K57.32Diverticulitis of large intestine without perforation or abscess without bleeding
- K57.33Diverticulitis of large intestine without perforation or abscess with bleeding
- K57.4Diverticulitis of both small and large intestine with perforation and abscess
- K57.40Diverticulitis of both small and large intestine with perforation and abscess without bleeding
- K57.41Diverticulitis of both small and large intestine with perforation and abscess with bleeding
- K57.5Diverticular disease of both small and large intestine without perforation or abscess
- K57.50Diverticulosis of both small and large intestine without perforation or abscess without bleeding
- K57.51Diverticulosis of both small and large intestine without perforation or abscess with bleeding
- K57.52Diverticulitis of both small and large intestine without perforation or abscess without bleeding
- K57.53Diverticulitis of both small and large intestine without perforation or abscess with bleeding
- K57.8Diverticulitis of intestine, part unspecified, with perforation and abscess
- K57.80Diverticulitis of intestine, part unspecified, with perforation and abscess without bleeding
- K57.81Diverticulitis of intestine, part unspecified, with perforation and abscess with bleeding
- K57.9Diverticular disease of intestine, part unspecified, without perforation or abscess
- K57.90Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding
- K57.91Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding
- K57.92Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding
- K57.93Diverticulitis of intestine, part unspecified, without perforation or abscess with bleeding
- K65.0Generalized (acute) peritonitis
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