ICD-10 Code C83.9A – Non-follicular (diffuse) lymphoma, unspecified, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.9A – Non-follicular (diffuse) lymphoma, unspecified, in remission
What it is
This code identifies a history of non-follicular, or diffuse, lymphoma that is currently in remission. Use it when the record states the lymphoma is no longer active and no specific subtype is documented.
Clinical signs
Clinical features vary; refer to documentation. In remission, the chart should indicate prior lymphoma with no current evidence of active disease, recurrence, or ongoing treatment for active malignancy.
When to use this code
Use this code when the provider documents non-follicular lymphoma, unspecified, as being in remission. It fits follow-up visits, surveillance care, or problem lists that clearly note remission status. If the subtype is known, or if disease is active or recurrent, choose the more specific documented code.
Do not use for
Do not use it for active lymphoma, suspected lymphoma, or relapse unless the record specifically says remission. Check documentation if the lymphoma type is follicular or another defined subtype.
Coding tip
Capture both the lymphoma type and remission status exactly as documented; if either is unclear, query the provider.