C95.01

HCC Category Mapping

What This Code Means

An acute leukemia of unknown cell type where the cancer has responded to treatment and is in remission.

Coding Tips

• •Document the remission status clearly; remission should be confirmed by bone marrow biopsy or peripheral blood counts
• •If the cell type becomes identified during treatment, consider updating to a more specific acute leukemia code

Clinical Significance

Acute leukemia of unspecified cell type in remission indicates that an acute leukemia of undetermined lineage has responded to treatment. If the cell type was never definitively characterized even after complete workup, this code remains appropriate, though it is more commonly a transitional code used while awaiting final pathologic classification.

Documentation Requirements

• ✓Remission status must be explicitly documented with supporting bone marrow evidence showing blast count below 5% and recovery of normal hematopoiesis.
• ✓Documentation should address why the cell type remains unspecified and whether further classification attempts are planned.
• ✓Ongoing surveillance plan must be recorded.

Commonly Confused Codes