ICD-10 Code C93.31 – Juvenile myelomonocytic leukemia, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C93.31 – Juvenile myelomonocytic leukemia, in remission
What it is
C93.31 identifies juvenile myelomonocytic leukemia, a rare childhood myeloproliferative/myelodysplastic neoplasm, documented as in remission. Use it when the condition is still relevant but no active disease is noted.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe JMML with monocytosis, splenomegaly, and other signs of marrow disease, but this code applies when the record states remission rather than active leukemia.
When to use this code
Use C93.31 when the provider documents juvenile myelomonocytic leukemia as in remission, including follow-up visits, surveillance, or history-based management tied to the prior diagnosis. Ensure the note clearly supports remission status. If the chart only says “history of leukemia” without remission wording, check documentation.
Do not use for
Do not use this code for active JMML, suspected leukemia, or unspecified leukemia status. If the record does not confirm remission, use the more appropriate active or unspecified diagnosis, or check documentation.
Coding tip
Code remission only when the provider explicitly documents it; otherwise, verify whether the encounter reflects active disease or a history of leukemia.