ICD-10 Code C83.1A – Mantle cell lymphoma, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.1A – Mantle cell lymphoma, in remission
What it is
C83.1A identifies mantle cell lymphoma that is currently in remission. Use it when the diagnosis remains relevant, but active disease is no longer present.
Clinical signs
Clinical features vary; refer to documentation. Remission generally means prior mantle cell lymphoma is controlled, with no clear evidence of active disease on the record.
When to use this code
Use this code when the provider documents mantle cell lymphoma as “in remission,” “in complete remission,” or a similar status. It supports follow-up care for a known history of this lymphoma when the condition is still being monitored.
Apply it only when remission is explicitly stated in the chart. If the note describes active disease, relapse, or treatment for ongoing lymphoma, you should not code remission.
Do not use for
Do not use C83.1A for active mantle cell lymphoma or for a past history of lymphoma without current remission status. Check documentation if the record does not clearly state remission.
Coding tip
Code the remission status only when it is documented by the provider, not assumed from surveillance or prior treatment.