Current
K51 — Ulcerative colitis
Part of Chapter 11: Diseases of the digestive system , block Noninfective enteritis and colitis (K50-K52) .
Official Notes
Use Additional Code
code to identify any associated fistulas, if applicable:
Use Additional Code
anal fistula ( K60.3- )
Use Additional Code
anorectal fistula ( K60.5- )
Use Additional Code
rectal fistula ( K60.4- )
Use Additional Code
code to identify manifestations, such as:
Use Additional Code
pyoderma gangrenosum ( L88 )
Excludes1
Crohn's disease [regional enteritis] ( K50 .-)
Child Codes
- K51.0 Ulcerative (chronic) pancolitis Has subcodes
- K51.2 Ulcerative (chronic) proctitis Has subcodes
- K51.3 Ulcerative (chronic) rectosigmoiditis Has subcodes
- K51.4 Inflammatory polyps of colon Has subcodes
- K51.5 Left sided colitis Has subcodes
- K51.8 Other ulcerative colitis Has subcodes
- K51.9 Ulcerative colitis, unspecified Has subcodes
Referenced By
Official notes on these codes cite K51.
- F54 Psychological and behavioral factors associated with disorders or diseases classified elsewhere Billable
- K50 Crohn's disease [regional enteritis]
- K60.3 Anal fistula
- K60.4 Rectal fistula
- K60.5 Anorectal fistula
- K62.6 Ulcer of anus and rectum Billable
- K63.3 Ulcer of intestine Billable
- M07 Enteropathic arthropathies
- M08 Juvenile arthritis
FY 2027 effective October 1, 2026 · CDC NCHS and CMS