ICD-10 Code C92.3 – Myeloid Sarcoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C92.3 – Myeloid sarcoma
What it is
C92.3 identifies myeloid sarcoma, a tumor made of immature myeloid cells that forms outside the bone marrow. Use it when the diagnosis is documented as a localized extramedullary myeloid neoplasm.
Clinical signs
Clinical features vary; refer to documentation. It may present as a mass in skin, soft tissue, bone, lymph node, or another organ, sometimes with or before acute myeloid leukemia.
When to use this code
Use C92.3 when the provider documents myeloid sarcoma, granulocytic sarcoma, or chloroma. Apply it for confirmed extramedullary disease, whether isolated or associated with leukemia, if the record clearly states this diagnosis.
If pathology, imaging, or specialist notes identify a myeloid sarcoma lesion, code this diagnosis rather than a nonspecific mass. Check documentation when the term is used loosely or the cell lineage is not confirmed.
Do not use for
Do not use this code for other leukemia types, nonspecific malignant tumors, or undifferentiated masses without myeloid confirmation. Check documentation if the lesion is only suspected.
Coding tip
Code the documented site and any associated leukemia separately when supported by the record.