ICD-10 Code C94.02 – Acute erythroid leukemia, in relapse (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C94.02 – Acute erythroid leukemia, in relapse
What it is
This code identifies acute erythroid leukemia that has returned after a period of remission. Use it when documentation states the disease is active again after prior response.
Clinical signs
Clinical features vary; refer to documentation. Commonly, relapse is supported by recurrent marrow involvement, worsening cytopenias, or return of leukemia-related symptoms after prior improvement.
When to use this code
Use C94.02 when the provider documents acute erythroid leukemia as “in relapse,” “recurrent,” or otherwise returned after remission. It is appropriate for encounters focused on assessment, monitoring, or management of the relapsed disease. Check documentation if the record does not clearly confirm relapse.
Do not use for
Do not use this code for newly diagnosed acute erythroid leukemia, remission status, or a history of leukemia without current relapse. If the note only says “possible relapse,” check documentation.
Coding tip
Code the relapse only when the provider clearly documents recurrence; otherwise, query for clarification.