ICD-10-CM
K51.21: Ulcerative (chronic) proctitis with complications
A header, not a billable code. Bill a more specific code under it.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
- Kind
- Header. Not a billable code.
- Category
- K51
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Codes under K51.21
A header groups codes and is not billed. A billable code is one you can report.
- 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
It's the public CDC file. Check the current ICD-10-CM guidelines before you code.
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From K51. A note on a category applies to every code under it.
Use additional code to identify any associated fistulas, if applicable:
- K60.3-Anal fistula
- K60.5-Anorectal fistula
- K60.4-Rectal fistula
- code to identify manifestations, such as:
- L88Pyoderma gangrenosum
Excludes1
Excludes1 means these codes are not reported together.
From K51. A note on a category applies to every code under it.