ICD-10 Code C94.82 – Other specified leukemias, in relapse (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C94.82 – Other specified leukemias, in relapse
What it is
This code identifies a leukemia that is not classified elsewhere and has returned after a period of improvement or remission. Use it when the record clearly states relapse and the leukemia type is otherwise specified.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with findings consistent with recurrent leukemia, such as abnormal blood counts, fatigue, infections, bleeding, or marrow involvement noted by the clinician.
When to use this code
Use C94.82 when the provider documents an “other specified” leukemia and confirms that it is in relapse. This is appropriate for follow-up encounters after prior response, when the disease has reappeared or progressed again. Check documentation if the leukemia subtype is not clearly named.
Do not use for
Do not use this code for leukemia in remission, newly diagnosed leukemia, or a leukemia type with a more specific ICD-10-CM code. If the record does not state relapse, check documentation.
Coding tip
Code the relapse status only when the provider explicitly documents recurrence, and verify whether a more specific leukemia code applies first.