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ICD-10-CM · FY 2026 APRIL UPDATE

K51

Ulcerative colitis

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
K51.0Ulcerative (chronic) pancolitisCategory
K51.00Ulcerative (chronic) pancolitis without complicationsBillable
K51.01Ulcerative (chronic) pancolitis with complicationsCategory
K51.011Ulcerative (chronic) pancolitis with rectal bleedingBillable
K51.012Ulcerative (chronic) pancolitis with intestinal obstructionBillable
K51.013Ulcerative (chronic) pancolitis with fistulaBillable
K51.014Ulcerative (chronic) pancolitis with abscessBillable
K51.018Ulcerative (chronic) pancolitis with other complicationBillable
K51.019Ulcerative (chronic) pancolitis with unspecified complicationsBillable
K51.2Ulcerative (chronic) proctitisCategory
K51.20Ulcerative (chronic) proctitis without complicationsBillable
K51.21Ulcerative (chronic) proctitis with complicationsCategory
K51.211Ulcerative (chronic) proctitis with rectal bleedingBillable
K51.212Ulcerative (chronic) proctitis with intestinal obstructionBillable
K51.213Ulcerative (chronic) proctitis with fistulaBillable
K51.214Ulcerative (chronic) proctitis with abscessBillable
K51.218Ulcerative (chronic) proctitis with other complicationBillable
K51.219Ulcerative (chronic) proctitis with unspecified complicationsBillable
K51.3Ulcerative (chronic) rectosigmoiditisCategory
K51.30Ulcerative (chronic) rectosigmoiditis without complicationsBillable
K51.31Ulcerative (chronic) rectosigmoiditis with complicationsCategory
K51.311Ulcerative (chronic) rectosigmoiditis with rectal bleedingBillable
K51.312Ulcerative (chronic) rectosigmoiditis with intestinal obstructionBillable
K51.313Ulcerative (chronic) rectosigmoiditis with fistulaBillable
K51.314Ulcerative (chronic) rectosigmoiditis with abscessBillable
K51.318Ulcerative (chronic) rectosigmoiditis with other complicationBillable
K51.319Ulcerative (chronic) rectosigmoiditis with unspecified complicationsBillable
K51.4Inflammatory polyps of colonCategory
K51.40Inflammatory polyps of colon without complicationsBillable
K51.41Inflammatory polyps of colon with complicationsCategory

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.