C92.51

HCC Category Mapping

What This Code Means

A type of blood cancer (acute myelomonocytic leukemia) where the cancer cells have responded to treatment and are no longer detectable.

Coding Tips

• •Use this code only when documentation explicitly states the patient is in remission
• •Remission status must be clearly documented in the medical record; do not assume based on treatment alone

Clinical Significance

Acute myelomonocytic leukemia in remission indicates successful response to induction chemotherapy with resolution of the dual myeloid/monocytic proliferation and normalization of bone marrow. The M4Eo variant with inv(16) has particularly good remission rates and long-term outcomes. Post-remission consolidation therapy, including potential high-dose cytarabine cycles, is essential to reduce relapse risk.

Documentation Requirements

• ✓Documentation must confirm remission with bone marrow blasts less than 5%, resolution of monocytic component, and count recovery.
• ✓The cytogenetic subtype (particularly inv(16) status) should remain documented as it influences consolidation therapy decisions.
• ✓Minimal residual disease assessment, consolidation treatment plan, and transplant candidacy evaluation should be recorded.

Commonly Confused Codes