Noninfective enteritis and colitis (K50-K52) ICD-10-CM
The K50–K52 section covers noninfective enteritis and colitis with 119 ICD-10-CM diagnosis codes, of which 91 are billable in fiscal year 2026. The section is organized into the 3 code ranges listed below.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- noninfective inflammatory bowel disease
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.
Code Ranges in This Section 3 ranges · 119 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| K50 | Crohn's disease [regional enteritis] (K50) | 37 | 28 |
| K51 | Ulcerative colitis (K51) | 64 | 49 |
| K52 | Other and unspecified noninfective gastroenteritis and colitis (K52) | 18 | 14 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the K50–K52 Code Range
ICD-10 codes K50-K52 cover noninfective enteritis and colitis, focusing on chronic inflammatory bowel diseases like Crohn's disease and ulcerative colitis, along with other noninfectious gastrointestinal inflammations. These codes are vital for identifying specific types, locations, and complications of these conditions, providing detailed classification for precise diagnosis.
This range includes Crohn's disease (K50), also called regional enteritis, affecting different parts of the intestine such as the small intestine (e.g., K50.00, known as ileojejunal Crohn disease or terminal ileitis) and large intestine, with codes distinguishing complications like rectal bleeding, fistulas, or abscesses. Similarly, ulcerative colitis (K51) is extensively detailed by anatomical location and symptoms, including pancolitis, proctitis, and left-sided colitis, as well as complications such as intestinal obstruction and gastrointestinal hemorrhage. Code K52 addresses other and unspecified noninfective gastroenteritis and colitis, covering causes like radiation (K52.0), toxic effects from drugs or substances (K52.1), allergic reactions such as food protein-induced enterocolitis (K52.21), and microscopic colitis types (K52.83). This coding structure supports clinicians and coders by linking conditions with their common synonyms, ensuring clear identification of complex inflammatory bowel diseases and related noninfectious gastrointestinal disorders.
Questions About This Page
How many codes are in the K50-K52 range?
The K50-K52 range contains 119 ICD-10-CM diagnosis codes in FY 2026. 91 of them are billable, and the rest are category headers that organize the section.
What conditions does K50-K52 cover?
The range covers noninfective enteritis and colitis. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
