ICD-10 Code C86.2 – Enteropathy-type (intestinal) T-cell lymphoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C86.2 – Enteropathy-type (intestinal) T-cell lymphoma
What it is
C86.2 identifies enteropathy-type intestinal T-cell lymphoma, a rare lymphoma that arises in the small intestine and is associated with intestinal disease. It is a malignant T-cell cancer, so use it only when the diagnosis is documented.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include abdominal pain, weight loss, diarrhea, malabsorption, and signs of intestinal ulceration or obstruction. Diagnosis is usually confirmed by pathology and clinical correlation.
When to use this code
Use C86.2 when the provider documents enteropathy-type or intestinal T-cell lymphoma, including cases described as lymphoma of the small bowel with this specific histology. Code it from the confirmed diagnosis, not from nonspecific gastrointestinal symptoms alone. Check documentation if the wording is unclear.
Do not use for
Do not use this code for celiac disease, nonspecific enteritis, or other intestinal lymphomas without documentation of enteropathy-type T-cell lymphoma. If the record only says “possible lymphoma,” check documentation.
Coding tip
Match the pathology report and the provider’s final diagnosis wording before assigning C86.2.