ICD-10 Code K50.818 – Crohn’s disease of both small and large intestine with other complication (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K50.818 – Crohn’s disease of both small and large intestine with other complication
What it is
K50.818 identifies Crohn’s disease involving both the small and large intestine when the record also shows another specified complication. Use it when the documentation supports ileocolonic Crohn’s disease plus an additional complication not captured by a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Crohn’s disease commonly presents with chronic abdominal pain, diarrhea, weight loss, and signs of intestinal inflammation, and the chart should also describe the associated complication.
When to use this code
Use this code when the provider documents Crohn’s disease affecting both small and large bowel and also notes another complication, such as a fistula, abscess, obstruction, or other specified problem. Make sure the complication is clearly identified in the record. If the site or complication is unclear, check documentation before coding.
Do not use for
Do not use K50.818 if Crohn’s disease involves only the small intestine or only the large intestine. Also avoid it when no additional complication is documented, or when the complication is unspecified and another code is more accurate.
Coding tip
Verify both the bowel location and the exact complication in the provider note before assigning K50.818.