ICD-10 Code K51.912 – Ulcerative colitis, unspecified with intestinal obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K51.912 – Ulcerative colitis, unspecified with intestinal obstruction
What it is
This code identifies ulcerative colitis when the type is not specified and the patient also has intestinal obstruction. It indicates inflammatory bowel disease with a documented blockage related to the condition.
Clinical signs
Typical findings include chronic colitis symptoms plus evidence of bowel obstruction, such as abdominal distention, pain, vomiting, or reduced stool passage. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents ulcerative colitis and clearly links it to intestinal obstruction, but does not specify a more exact ulcerative colitis subtype. Apply it when the obstruction is part of the current encounter and supported by the record. Check documentation if the note only mentions suspected obstruction.
Do not use for
Do not use this code if ulcerative colitis is documented without obstruction, or if the obstruction is caused by another condition. Do not assign it when documentation is nonspecific or conflicting.
Coding tip
Confirm both the ulcerative colitis diagnosis and the obstruction relationship in the provider note before assigning K51.912.