K51.4Inflammatory polyps of colon

K51.4 is the ICD-10-CM diagnosis code for inflammatory polyps of colon. It belongs to category K51 (ulcerative colitis), block K50-K52 (noninfective enteritis and colitis) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within K51 (ulcerative colitis), K51.4 is specifically for inflammatory polyps of colon. Related codes cover ulcerative (chronic) pancolitis (K51.0), ulcerative (chronic) proctitis (K51.2), ulcerative (chronic) rectosigmoiditis (K51.3), left sided colitis (K51.5), other ulcerative colitis (K51.8) and unspecified (K51.9).

To report this condition, pick the subcode that matches the documentation: K51.40 (without complications) and K51.41 (with complications).

The conditions in its Excludes2 note aren't part of K51.4, but may be coded alongside it if the patient has both: adenomatous polyp of colon (D12.6), polyposis of colon (D12.6) and polyps of colon NOS (K63.5).

Use an additional code to identify any associated fistulas, if applicable: anal fistula (K60.3-), anorectal fistula (K60.5-) and rectal fistula (K60.4-). Use an additional code to identify manifestations, such as: pyoderma gangrenosum (L88).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.