ICD-10 Code C93.90 – Monocytic leukemia, unspecified, not having achieved remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C93.90 – Monocytic leukemia, unspecified, not having achieved remission
What it is
C93.90 identifies monocytic leukemia when the subtype is not further specified and the disease has not achieved remission. Use it for a documented monocytic leukemia diagnosis that remains active.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include leukemia-related symptoms, abnormal blood counts, or bone marrow involvement consistent with monocytic leukemia.
When to use this code
Use this code when the provider documents monocytic leukemia, unspecified, and clearly states the patient is not in remission. It also fits follow-up or ongoing care encounters if the leukemia remains active. If the record names a more specific subtype, code that instead.
Do not use for
Do not use C93.90 if the leukemia is documented as in remission or if a more specific monocytic leukemia code is available. Check documentation when the diagnosis is uncertain or incomplete.
Coding tip
Confirm both the leukemia type and remission status in the note before assigning C93.90.