ICD-10 Code C86.41 – Blastic NK-cell lymphoma, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C86.41 – Blastic NK-cell lymphoma, in remission
What it is
This code identifies a documented history of blastic NK-cell lymphoma that is currently in remission. Use it when the lymphoma is not active but remains clinically relevant.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe an aggressive NK-cell lymphoma with prior malignant findings, but remission means there is no current active disease noted.
When to use this code
Use this code when the provider states blastic NK-cell lymphoma is in remission, such as during follow-up after treatment. It may apply to surveillance visits, survivorship care, or problem lists when the condition remains part of the patient’s record.
Do not use it for an active lymphoma diagnosis, suspected disease, or incomplete documentation. Check the note for explicit remission language before assigning the code.
Do not use for
Do not use this code if the lymphoma is active, recurrent, or only being evaluated. Check documentation if the record does not clearly state remission.
Coding tip
Assign C86.41 only when the provider explicitly documents remission; otherwise, query for clarification.