C95.10

HCC Category Mapping

What This Code Means

A chronic leukemia of unknown cell type that has not responded to treatment or achieved remission.

Coding Tips

• •Verify the chronic nature of the leukemia in documentation; chronic leukemias typically progress more slowly than acute types
• •Review pathology to determine if a more specific chronic leukemia code (C92.1, C93.1, C94.1) is appropriate

Clinical Significance

Chronic leukemia of unspecified cell type not having achieved remission is used when a chronic leukemia is confirmed but the specific cell lineage cannot be determined from available documentation. Chronic leukemias typically have a more indolent course than acute forms, but unspecified status limits treatment optimization.

Documentation Requirements

• ✓Documentation should confirm the chronic nature of the leukemia through clinical course and pathologic findings, while explaining why the cell type remains unspecified.
• ✓Diagnostic workup attempted (flow cytometry, cytogenetics, molecular studies) should be documented.
• ✓Treatment status confirming no remission must be recorded.

Commonly Confused Codes