C92.90

HCC Category Mapping

What This Code Means

A type of myeloid blood cancer that cannot be more specifically classified and has not responded adequately to initial treatment.

Coding Tips

• •Use this code when the specific subtype of myeloid leukemia cannot be determined from available documentation
• •This is a less specific code; attempt to obtain more detailed pathology information when possible

Clinical Significance

Myeloid leukemia, unspecified, not in remission is a nonspecific code used when the exact subtype of myeloid leukemia cannot be determined but active disease is present. This code should be avoided when more specific classification is possible, as AML subtype significantly impacts treatment selection and prognosis. Importantly, this code does not distinguish between acute and chronic disease, which have vastly different clinical implications.

Documentation Requirements

• ✓Documentation should aim to clarify whether the leukemia is acute or chronic, as this distinction dramatically affects treatment and prognosis.
• ✓Any available cytogenetic, molecular, or morphologic data should be recorded.
• ✓Active disease status must be explicitly stated.
• ✓If the lack of specificity is due to pending diagnostic workup, the code should be updated once results are available.

Commonly Confused Codes