ICD-10 Code C93.02 – Acute monoblastic/monocytic leukemia, in relapse (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C93.02 – Acute monoblastic/monocytic leukemia, in relapse
What it is
C93.02 identifies acute monoblastic or monocytic leukemia that has returned after remission. Use it when the leukemia is documented as relapsed, recurrent, or back after prior response.
Clinical signs
Clinical features vary; refer to documentation. Common findings in relapsed acute leukemia may include worsening anemia, infections, bleeding, fatigue, or marrow failure, but the code is based on the documented relapse status.
When to use this code
Use this code when the record states acute monoblastic/monocytic leukemia has relapsed after prior remission or treatment response. It also fits follow-up encounters where the clinician documents recurrent disease. If the subtype or relapse status is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for initial diagnosis, remission, or unspecified acute leukemia. If the chart does not confirm monoblastic/monocytic subtype or relapse, avoid coding C93.02.
Coding tip
Code the relapse only when the provider clearly documents recurrent disease; otherwise, query for specificity.