ICD-10 Code C93.Z – Other monocytic leukemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C93.Z – Other monocytic leukemia
What it is
C93.Z identifies a leukemia of monocytic lineage that does not fit a more specific ICD-10 category. Use it when the record clearly states other monocytic leukemia and no narrower code is documented.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with signs of leukemia such as fatigue, infections, bruising, or abnormal blood counts, but the coding choice depends on the documented diagnosis.
When to use this code
Use C93.Z when the provider documents other monocytic leukemia and the chart does not specify a more exact subtype. It also applies when the record distinguishes monocytic leukemia from other leukemias but leaves the subtype unspecified. Check documentation if the term is ambiguous or incomplete.
Do not use for
Do not use this code for acute or chronic myeloid leukemia, other specified leukemias, or cases where the provider documents a different leukemia type. If the diagnosis is not clearly monocytic, check documentation.
Coding tip
Code the leukemia type exactly as documented and query for specificity when the note only says “leukemia.”