K51 Ulcerative colitis
ICD-10-CM category K51 sits in Chapter 11 (Diseases of the digestive system, K00-K95). It contains 49 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
K51.0 Ulcerative (chronic) pancolitisK51.01 Ulcerative (chronic) pancolitis with complicationsK51.2 Ulcerative (chronic) proctitisK51.21 Ulcerative (chronic) proctitis with complicationsK51.3 Ulcerative (chronic) rectosigmoiditisK51.31 Ulcerative (chronic) rectosigmoiditis with complicationsK51.4 Inflammatory polyps of colonK51.41 Inflammatory polyps of colon with complicationsK51.5 Left sided colitisK51.51 Left sided colitis with complicationsK51.8 Other ulcerative colitisK51.81 Other ulcerative colitis with complicationsK51.9 Ulcerative colitis, unspecifiedK51.91 Ulcerative colitis, unspecified, with complications
Billable codes in K51
| Code | Description |
|---|---|
K51.00 | Ulcerative (chronic) pancolitis without complications |
K51.011 | Ulcerative (chronic) pancolitis with rectal bleeding |
K51.012 | Ulcerative (chronic) pancolitis with intestinal obstruction |
K51.013 | Ulcerative (chronic) pancolitis with fistula |
K51.014 | Ulcerative (chronic) pancolitis with abscess |
K51.018 | Ulcerative (chronic) pancolitis with other complication |
K51.019 | Ulcerative (chronic) pancolitis with unspecified complications |
K51.20 | Ulcerative (chronic) proctitis without complications |
K51.211 | Ulcerative (chronic) proctitis with rectal bleeding |
K51.212 | Ulcerative (chronic) proctitis with intestinal obstruction |
K51.213 | Ulcerative (chronic) proctitis with fistula |
K51.214 | Ulcerative (chronic) proctitis with abscess |
K51.218 | Ulcerative (chronic) proctitis with other complication |
K51.219 | Ulcerative (chronic) proctitis with unspecified complications |
K51.30 | Ulcerative (chronic) rectosigmoiditis without complications |
K51.311 | Ulcerative (chronic) rectosigmoiditis with rectal bleeding |
K51.312 | Ulcerative (chronic) rectosigmoiditis with intestinal obstruction |
K51.313 | Ulcerative (chronic) rectosigmoiditis with fistula |
K51.314 | Ulcerative (chronic) rectosigmoiditis with abscess |
K51.318 | Ulcerative (chronic) rectosigmoiditis with other complication |
K51.319 | Ulcerative (chronic) rectosigmoiditis with unspecified complications |
K51.40 | Inflammatory polyps of colon without complications |
K51.411 | Inflammatory polyps of colon with rectal bleeding |
K51.412 | Inflammatory polyps of colon with intestinal obstruction |
K51.413 | Inflammatory polyps of colon with fistula |
K51.414 | Inflammatory polyps of colon with abscess |
K51.418 | Inflammatory polyps of colon with other complication |
K51.419 | Inflammatory polyps of colon with unspecified complications |
K51.50 | Left sided colitis without complications |
K51.511 | Left sided colitis with rectal bleeding |
K51.512 | Left sided colitis with intestinal obstruction |
K51.513 | Left sided colitis with fistula |
K51.514 | Left sided colitis with abscess |
K51.518 | Left sided colitis with other complication |
K51.519 | Left sided colitis with unspecified complications |
K51.80 | Other ulcerative colitis without complications |
K51.811 | Other ulcerative colitis with rectal bleeding |
K51.812 | Other ulcerative colitis with intestinal obstruction |
K51.813 | Other ulcerative colitis with fistula |
K51.814 | Other ulcerative colitis with abscess |
K51.818 | Other ulcerative colitis with other complication |
K51.819 | Other ulcerative colitis with unspecified complications |
K51.90 | Ulcerative colitis, unspecified, without complications |
K51.911 | Ulcerative colitis, unspecified with rectal bleeding |
K51.912 | Ulcerative colitis, unspecified with intestinal obstruction |
K51.913 | Ulcerative colitis, unspecified with fistula |
K51.914 | Ulcerative colitis, unspecified with abscess |
K51.918 | Ulcerative colitis, unspecified with other complication |
K51.919 | Ulcerative colitis, unspecified with unspecified complications |
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