ICD-10 Code C88.20 – Heavy chain disease not having achieved remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C88.20 – Heavy chain disease not having achieved remission
What it is
This code identifies heavy chain disease that is still active and has not gone into remission. Use it when the diagnosis is established and the record states the condition is not in remission.
Clinical signs
Clinical features vary; refer to documentation. Patients may have findings related to an underlying lymphoproliferative disorder, but you should not infer remission status without explicit provider documentation.
When to use this code
Use C88.20 when the provider documents heavy chain disease and clearly states it has not achieved remission. It is appropriate for ongoing disease management, follow-up visits, or active evaluation when the condition remains present. If the note only says “history of” or does not state remission status, check documentation.
Do not use for
Do not use this code if the record documents remission, because a different code may apply. Also avoid it when heavy chain disease is only suspected, ruled out, or not specifically documented.
Coding tip
Code the remission status only when the provider states it; do not assume active disease from treatment or follow-up alone.