ICD-10 Code K50.1 – Crohn’s Disease of Large Intestine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K50.1 – Crohn’s disease of large intestine
What it is
K50.1 identifies Crohn’s disease limited to the large intestine. Use it when documentation specifies colonic Crohn’s disease or Crohn’s colitis.
Clinical signs
Typical findings include chronic inflammatory bowel disease affecting the colon, with abdominal pain, diarrhea, and sometimes rectal bleeding. Clinical features vary; refer to documentation.
When to use this code
Use K50.1 when the provider documents Crohn’s disease of the large intestine, Crohn’s colitis, or colonic Crohn’s disease. Code this when the record clearly localizes disease to the colon and does not describe small bowel involvement. Check documentation if the site is unclear.
Do not use for
Do not use this code for Crohn’s disease confined to the small intestine or for unspecified Crohn’s disease. Do not assign it when the chart only says inflammatory bowel disease without a Crohn’s diagnosis.
Coding tip
Verify the anatomic site in the provider note before coding, because Crohn’s disease codes are location-specific.