K51Ulcerative colitis
ICD-10-CM category (non-billable header) code — part of Noninfective enteritis and colitis (K50-K52)
Coding Notes
Excludes1 (never code both together)
- Crohn's disease [regional enteritis] (K50.-)
Use Additional Code
- code to identify any associated fistulas, if applicable:
- anal fistula (K60.3-)
- anorectal fistula (K60.5-)
- rectal fistula (K60.4-)
- code to identify manifestations, such as:
- pyoderma gangrenosum (L88)
Subcategories (7)
- K51.0 Ulcerative (chronic) pancolitis
- K51.2 Ulcerative (chronic) proctitis
- K51.3 Ulcerative (chronic) rectosigmoiditis
- K51.4 Inflammatory polyps of colon
- K51.5 Left sided colitis
- K51.8 Other ulcerative colitis
- K51.9 Ulcerative colitis, unspecified