ICD-10 Code C86.21 – Enteropathy-type (intestinal) T-cell lymphoma, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C86.21 – Enteropathy-type (intestinal) T-cell lymphoma, in remission
What it is
C86.21 identifies a history of enteropathy-type intestinal T-cell lymphoma that is currently in remission. Use it when the lymphoma remains a documented diagnosis, but active disease is not being treated or described.
Clinical signs
Clinical features vary; refer to documentation. This lymphoma is typically associated with intestinal involvement and may be described with abdominal symptoms, malabsorption, or weight loss when active.
When to use this code
Use this code when the provider documents enteropathy-type intestinal T-cell lymphoma as in remission, inactive, or without evidence of active disease. It is appropriate for follow-up visits, surveillance, or problem lists when the condition still affects care planning. Do not substitute an active malignancy code unless current disease is documented.
Do not use for
Do not use this code for active enteropathy-type intestinal T-cell lymphoma. Check documentation if the record only mentions suspected lymphoma, past treatment, or nonspecific intestinal symptoms without a confirmed remission status.
Coding tip
Code remission only when the provider clearly states it; otherwise, query or check documentation.