K51.21
⚠ Non-billable (Header)Ulcerative (chronic) proctitis with complications
Diseases of the digestive system (K00-K95)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for K51.21
Child Codes (6)
K51.211Ulcerative (chronic) proctitis with rectal bleedingK51.212Ulcerative (chronic) proctitis with intestinal obstructionK51.213Ulcerative (chronic) proctitis with fistulaK51.214Ulcerative (chronic) proctitis with abscessK51.218Ulcerative (chronic) proctitis with other complicationK51.219Ulcerative (chronic) proctitis with unspecified complications
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CodeK51.21
BillableNo — Header code
ParentK51.2
CategoryDiseases of the digestive system (K00-K95)
Excludes10 rule(s)
Excludes20 note(s)
Child codes6
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)