ICD-10 Code K50.811 – Crohn’s disease of both small and large intestine with rectal bleeding (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K50.811 – Crohn’s disease of both small and large intestine with rectal bleeding
What it is
K50.811 identifies Crohn’s disease affecting both the small and large intestine when rectal bleeding is documented. Use it for inflammatory bowel disease with this specific anatomic involvement and bleeding feature.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include chronic abdominal pain, diarrhea, weight loss, and evidence of gastrointestinal bleeding from rectal bleeding or blood in stool.
When to use this code
Use this code when the provider documents Crohn’s disease involving both the small and large intestine and also notes rectal bleeding. It fits outpatient, inpatient, and problem-list documentation when both elements are clearly supported. If the record only states Crohn’s disease without site or bleeding detail, check documentation before assigning this code.
Do not use for
Do not use K50.811 if rectal bleeding is absent or if the Crohn’s disease location is limited to another intestinal segment. Do not use it for non-Crohn causes of lower gastrointestinal bleeding.
Coding tip
Verify both the anatomic site and the bleeding detail in the provider note before coding K50.811.