ICD-10 Code K51.418 – Inflammatory polyps of colon with other complication (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K51.418 – Inflammatory polyps of colon with other complication
What it is
This code identifies inflammatory polyps in the colon when ulcerative colitis is present and another documented complication applies. It tells you the polyp finding is part of the colitis picture, not a separate benign colon polyp diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe colonic mucosal inflammation with polypoid lesions seen on colonoscopy or pathology, along with a complication noted by the provider.
When to use this code
Use this code when the provider documents inflammatory polyps of the colon and specifies a complication other than rectal bleeding or obstruction. It is appropriate when the complication is linked to ulcerative colitis and the record supports that relationship. Check documentation if the complication is unclear.
Do not use for
Do not use this code for ordinary adenomatous or hyperplastic colon polyps, or for inflammatory polyps without a documented ulcerative colitis connection. If the complication is not specified, check documentation.
Coding tip
Verify the exact complication and the ulcerative colitis linkage before assigning K51.418.