K51
⚠ Non-billable (Header)Ulcerative colitis
Diseases of the digestive system (K00-K95)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
directCannot be coded with K51
- • Crohn's disease [regional enteritis] (K50.-)
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CodeK51
BillableNo — Header code
CategoryDiseases of the digestive system (K00-K95)
Excludes11 rule(s)
Excludes20 note(s)
Child codes7
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)