ICD-10-CM
K51.318: Ulcerative (chronic) rectosigmoiditis with other complication
A billable ICD-10-CM diagnosis code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
- Kind
- Billable code
- Category
- K51
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Nearby codes
A header groups codes and is not billed. A billable code is one you can report.
- 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
- K51.319Ulcerative (chronic) rectosigmoiditis 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.
CMS-HCC, payment year 2027 (initial mapping)
A CMS-HCC group is a risk-adjustment category. This page does not decide payment.
- CMS-HCC category 81 (payment year 2027 model)