ICD-10-CM Section · K50-K52
Noninfective enteritis and colitis
119 codes in this section
119
Total Codes
91
Billable
28
Header (Non-Billable)
3
Top-Level Codes
About Section K50-K52
Section K50-K52 (K50-K52) covers noninfective enteritis and colitis. It sits within the Diseases of the digestive system chapter (K00-K95). This section contains 119 ICD-10-CM codes, 91 billable diagnoses you can submit on a claim, and 28 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in K50-K52
Grouped by 3-character root code. Click any code for full detail.
K50
Crohn's disease [regional enteritis]
36 subcodes
| K50.0 | Crohn's disease of small intestine | Header |
| K50.00 | Crohn's disease of small intestine without complications | Billable |
| K50.01 | Crohn's disease of small intestine with complications | Header |
| K50.011 | Crohn's disease of small intestine with rectal bleeding | Billable |
| K50.012 | Crohn's disease of small intestine with intestinal obstruction | Billable |
| K50.013 | Crohn's disease of small intestine with fistula | Billable |
| K50.014 | Crohn's disease of small intestine with abscess | Billable |
| K50.018 | Crohn's disease of small intestine with other complication | Billable |
| K50.019 | Crohn's disease of small intestine with unspecified complications | Billable |
| K50.1 | Crohn's disease of large intestine | Header |
| K50.10 | Crohn's disease of large intestine without complications | Billable |
| K50.11 | Crohn's disease of large intestine with complications | Header |
| K50.111 | Crohn's disease of large intestine with rectal bleeding | Billable |
| K50.112 | Crohn's disease of large intestine with intestinal obstruction | Billable |
| K50.113 | Crohn's disease of large intestine with fistula | Billable |
| K50.114 | Crohn's disease of large intestine with abscess | Billable |
| K50.118 | Crohn's disease of large intestine with other complication | Billable |
| K50.119 | Crohn's disease of large intestine with unspecified complications | Billable |
| K50.8 | Crohn's disease of both small and large intestine | Header |
| K50.80 | Crohn's disease of both small and large intestine without complications | Billable |
| K50.81 | Crohn's disease of both small and large intestine with complications | Header |
| K50.811 | Crohn's disease of both small and large intestine with rectal bleeding | Billable |
| K50.812 | Crohn's disease of both small and large intestine with intestinal obstruction | Billable |
| K50.813 | Crohn's disease of both small and large intestine with fistula | Billable |
| K50.814 | Crohn's disease of both small and large intestine with abscess | Billable |
| K50.818 | Crohn's disease of both small and large intestine with other complication | Billable |
| K50.819 | Crohn's disease of both small and large intestine with unspecified complications | Billable |
| K50.9 | Crohn's disease, unspecified | Header |
| K50.90 | Crohn's disease, unspecified, without complications | Billable |
| K50.91 | Crohn's disease, unspecified, with complications | Header |
| K50.911 | Crohn's disease, unspecified, with rectal bleeding | Billable |
| K50.912 | Crohn's disease, unspecified, with intestinal obstruction | Billable |
| K50.913 | Crohn's disease, unspecified, with fistula | Billable |
| K50.914 | Crohn's disease, unspecified, with abscess | Billable |
| K50.918 | Crohn's disease, unspecified, with other complication | Billable |
| K50.919 | Crohn's disease, unspecified, with unspecified complications | Billable |
K51
Ulcerative colitis
63 subcodes
| K51.0 | Ulcerative (chronic) pancolitis | Header |
| K51.00 | Ulcerative (chronic) pancolitis without complications | Billable |
| K51.01 | Ulcerative (chronic) pancolitis with complications | Header |
| K51.011 | Ulcerative (chronic) pancolitis with rectal bleeding | Billable |
| K51.012 | Ulcerative (chronic) pancolitis with intestinal obstruction | Billable |
| K51.013 | Ulcerative (chronic) pancolitis with fistula | Billable |
| K51.014 | Ulcerative (chronic) pancolitis with abscess | Billable |
| K51.018 | Ulcerative (chronic) pancolitis with other complication | Billable |
| K51.019 | Ulcerative (chronic) pancolitis with unspecified complications | Billable |
| K51.2 | Ulcerative (chronic) proctitis | Header |
| K51.20 | Ulcerative (chronic) proctitis without complications | Billable |
| K51.21 | Ulcerative (chronic) proctitis with complications | Header |
| K51.211 | Ulcerative (chronic) proctitis with rectal bleeding | Billable |
| K51.212 | Ulcerative (chronic) proctitis with intestinal obstruction | Billable |
| K51.213 | Ulcerative (chronic) proctitis with fistula | Billable |
| K51.214 | Ulcerative (chronic) proctitis with abscess | Billable |
| K51.218 | Ulcerative (chronic) proctitis with other complication | Billable |
| K51.219 | Ulcerative (chronic) proctitis with unspecified complications | Billable |
| K51.3 | Ulcerative (chronic) rectosigmoiditis | Header |
| K51.30 | Ulcerative (chronic) rectosigmoiditis without complications | Billable |
| K51.31 | Ulcerative (chronic) rectosigmoiditis with complications | Header |
| K51.311 | Ulcerative (chronic) rectosigmoiditis with rectal bleeding | Billable |
| K51.312 | Ulcerative (chronic) rectosigmoiditis with intestinal obstruction | Billable |
| K51.313 | Ulcerative (chronic) rectosigmoiditis with fistula | Billable |
| K51.314 | Ulcerative (chronic) rectosigmoiditis with abscess | Billable |
| K51.318 | Ulcerative (chronic) rectosigmoiditis with other complication | Billable |
| K51.319 | Ulcerative (chronic) rectosigmoiditis with unspecified complications | Billable |
| K51.4 | Inflammatory polyps of colon | Header |
| K51.40 | Inflammatory polyps of colon without complications | Billable |
| K51.41 | Inflammatory polyps of colon with complications | Header |
| K51.411 | Inflammatory polyps of colon with rectal bleeding | Billable |
| K51.412 | Inflammatory polyps of colon with intestinal obstruction | Billable |
| K51.413 | Inflammatory polyps of colon with fistula | Billable |
| K51.414 | Inflammatory polyps of colon with abscess | Billable |
| K51.418 | Inflammatory polyps of colon with other complication | Billable |
| K51.419 | Inflammatory polyps of colon with unspecified complications | Billable |
| K51.5 | Left sided colitis | Header |
| K51.50 | Left sided colitis without complications | Billable |
| K51.51 | Left sided colitis with complications | Header |
| K51.511 | Left sided colitis with rectal bleeding | Billable |
| K51.512 | Left sided colitis with intestinal obstruction | Billable |
| K51.513 | Left sided colitis with fistula | Billable |
| K51.514 | Left sided colitis with abscess | Billable |
| K51.518 | Left sided colitis with other complication | Billable |
| K51.519 | Left sided colitis with unspecified complications | Billable |
| K51.8 | Other ulcerative colitis | Header |
| K51.80 | Other ulcerative colitis without complications | Billable |
| K51.81 | Other ulcerative colitis with complications | Header |
| K51.811 | Other ulcerative colitis with rectal bleeding | Billable |
| K51.812 | Other ulcerative colitis with intestinal obstruction | Billable |
| K51.813 | Other ulcerative colitis with fistula | Billable |
| K51.814 | Other ulcerative colitis with abscess | Billable |
| K51.818 | Other ulcerative colitis with other complication | Billable |
| K51.819 | Other ulcerative colitis with unspecified complications | Billable |
| K51.9 | Ulcerative colitis, unspecified | Header |
| K51.90 | Ulcerative colitis, unspecified, without complications | Billable |
| K51.91 | Ulcerative colitis, unspecified, with complications | Header |
| K51.911 | Ulcerative colitis, unspecified with rectal bleeding | Billable |
| K51.912 | Ulcerative colitis, unspecified with intestinal obstruction | Billable |
| K51.913 | Ulcerative colitis, unspecified with fistula | Billable |
| K51.914 | Ulcerative colitis, unspecified with abscess | Billable |
| K51.918 | Ulcerative colitis, unspecified with other complication | Billable |
| K51.919 | Ulcerative colitis, unspecified with unspecified complications | Billable |
K52
Other and unspecified noninfective gastroenteritis and colitis
17 subcodes
| K52.0 | Gastroenteritis and colitis due to radiation | Billable |
| K52.1 | Toxic gastroenteritis and colitis | Billable |
| K52.2 | Allergic and dietetic gastroenteritis and colitis | Header |
| K52.21 | Food protein-induced enterocolitis syndrome | Billable |
| K52.22 | Food protein-induced enteropathy | Billable |
| K52.29 | Other allergic and dietetic gastroenteritis and colitis | Billable |
| K52.3 | Indeterminate colitis | Billable |
| K52.8 | Other specified noninfective gastroenteritis and colitis | Header |
| K52.81 | Eosinophilic gastritis or gastroenteritis | Billable |
| K52.82 | Eosinophilic colitis | Billable |
| K52.83 | Microscopic colitis | Header |
| K52.831 | Collagenous colitis | Billable |
| K52.832 | Lymphocytic colitis | Billable |
| K52.838 | Other microscopic colitis | Billable |
| K52.839 | Microscopic colitis, unspecified | Billable |
| K52.89 | Other specified noninfective gastroenteritis and colitis | Billable |
| K52.9 | Noninfective gastroenteritis and colitis, unspecified | Billable |
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Verified against the CMS 2026 code set on May 31, 2026.
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