ICD-10 Code K51.212 – Ulcerative (chronic) proctitis with intestinal obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K51.212 – Ulcerative (chronic) proctitis with intestinal obstruction
What it is
This code identifies chronic ulcerative inflammation limited to the rectum, with associated intestinal obstruction. Use it when the record shows ulcerative proctitis and obstruction from the same condition.
Clinical signs
Typical findings include rectal bleeding, urgency, tenesmus, and lower abdominal discomfort. Clinical features vary; refer to documentation for evidence of bowel obstruction, such as narrowed passage or obstructive symptoms.
When to use this code
Use K51.212 when the provider documents ulcerative proctitis and specifically links it to intestinal obstruction. The note should support chronic ulcerative disease of the rectum, not a different colitis type. If obstruction is mentioned without a clear cause, check documentation before assigning this code.
Do not use for
Do not use this code for ulcerative colitis without rectal involvement or for obstruction caused by another diagnosis. Check documentation if the record describes Crohn disease, infectious colitis, or nonspecific bowel blockage.
Coding tip
Code the condition only when both ulcerative proctitis and intestinal obstruction are documented together in the same encounter.