ICD-10 Code C91.A1 – Mature B-cell leukemia Burkitt-type, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C91.A1 – Mature B-cell leukemia Burkitt-type, in remission
What it is
This code identifies a history of Burkitt-type mature B-cell leukemia that is currently in remission. Use it when the leukemia is not active, but the diagnosis remains clinically relevant.
Clinical signs
Clinical features vary; refer to documentation. In remission, you may see no active disease findings, while the record still reflects prior Burkitt-type mature B-cell leukemia.
When to use this code
Use this code when the provider documents Burkitt-type mature B-cell leukemia as in remission, including follow-up visits after treatment. It may also apply when the condition is listed as stable or inactive, but remission is clearly stated. Check documentation if the status is unclear.
Do not use for
Do not use this code for active leukemia, relapse, or uncertain disease status. If the chart does not specify remission, check documentation before assigning C91.A1.
Coding tip
Code remission only when the clinician explicitly documents it; do not infer inactive disease from treatment history alone.