Diverticular disease of intestine (K57) ICD-10-CM
The K57 code range covers diverticular disease of intestine with 33 ICD-10-CM diagnosis codes. 24 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- if applicable peritonitis K65
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- diverticulum of appendix K38.2
Codes in the K57 Range 33 codes · 24 billable
- K57 Diverticular disease of intestineNon-billable
- K57.0 Diverticulitis of small intestine with perforation and abscessNon-billable
- K57.00 Diverticulitis of small intestine with perforation and abscess without bleeding
- K57.01 Diverticulitis of small intestine with perforation and abscess with bleeding
- K57.1 Diverticular disease of small intestine without perforation or abscessNon-billable
- K57.10 Diverticulosis of small intestine without perforation or abscess without bleeding
- K57.11 Diverticulosis of small intestine without perforation or abscess with bleeding
- K57.12 Diverticulitis of small intestine without perforation or abscess without bleeding
- K57.13 Diverticulitis of small intestine without perforation or abscess with bleeding
- K57.2 Diverticulitis of large intestine with perforation and abscessNon-billable
- K57.20 Diverticulitis of large intestine with perforation and abscess without bleeding
- K57.21 Diverticulitis of large intestine with perforation and abscess with bleeding
- K57.3 Diverticular disease of large intestine without perforation or abscessNon-billable
- K57.30 Diverticulosis of large intestine without perforation or abscess without bleeding
- K57.31 Diverticulosis of large intestine without perforation or abscess with bleeding
- K57.32 Diverticulitis of large intestine without perforation or abscess without bleeding
- K57.33 Diverticulitis of large intestine without perforation or abscess with bleeding
- K57.4 Diverticulitis of both small and large intestine with perforation and abscessNon-billable
- K57.40 Diverticulitis of both small and large intestine with perforation and abscess without bleeding
- K57.41 Diverticulitis of both small and large intestine with perforation and abscess with bleeding
- K57.5 Diverticular disease of both small and large intestine without perforation or abscessNon-billable
- K57.50 Diverticulosis of both small and large intestine without perforation or abscess without bleeding
- K57.51 Diverticulosis of both small and large intestine without perforation or abscess with bleeding
- K57.52 Diverticulitis of both small and large intestine without perforation or abscess without bleeding
- K57.53 Diverticulitis of both small and large intestine without perforation or abscess with bleeding
- K57.8 Diverticulitis of intestine, part unspecified, with perforation and abscessNon-billable
- K57.80 Diverticulitis of intestine, part unspecified, with perforation and abscess without bleeding
- K57.81 Diverticulitis of intestine, part unspecified, with perforation and abscess with bleeding
- K57.9 Diverticular disease of intestine, part unspecified, without perforation or abscessNon-billable
- K57.90 Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding
- K57.91 Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding
- K57.92 Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding
- K57.93 Diverticulitis of intestine, part unspecified, without perforation or abscess with bleeding
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the K57 range.
Diverticulitis
Inflammation of a DIVERTICULUM or diverticula.
Diverticulitis, Colonic
Inflammation of the COLONIC DIVERTICULA, generally with abscess formation and subsequent perforation.
Diverticulum
A pouch or sac developed from a tubular or saccular organ, such as the GASTROINTESTINAL TRACT.
Typhlitis
Necrotizing inflammation of the CECUM (typhlon in Greek), sometimes spreading to the APPENDIX and/or the ILEUM. Symptoms include ABDOMINAL PAIN and DIARRHEA. Its pathogenesis is multifactorial. Typhlitis is often associated with NEUTROPENIA and chemotherapy in immunocompromised individuals (IMMUNOCOMPROMISED HOST).
About the K57 Code Range
The K57 series of ICD-10 codes are used to classify diverticular disease of the intestine, covering various forms of diverticulitis and diverticulosis affecting the small and large intestines. These codes identify whether the condition involves complications such as perforation, abscess, or bleeding.
These codes specify conditions like diverticulitis of the small intestine with perforation and abscess (K57.0), including cases with or without bleeding (e.g., K57.00, K57.01), and diverticulosis without such complications (K57.1). Synonyms such as "abscess of duodenum due to diverticulitis" or "perforated diverticulum of small intestine" map to these detailed categories, aiding correct coding. Similarly, diverticular disease of the large intestine is classified separately (e.g., K57.2 for complicated cases and K57.3 for uncomplicated cases) with synonyms like "diverticulitis of sigmoid colon" guiding code selection. The codes also include combinations affecting both small and large intestines and cases where the affected part is unspecified (K57.4 to K57.9). Using the appropriate ICD-10 code for diverticular disease of intestine ensures precise documentation of disease severity and complications.
Questions About This Page
How many billable codes are in the K57 range?
Of the 33 codes in this range, 24 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the K57 range classify?
The range classifies diverticular disease of intestine. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
