C94.02

HCC Category Mapping

What This Code Means

A rare blood cancer where immature red blood cell precursors multiply uncontrollably, and the cancer has returned after previous treatment.

Coding Tips

• •Verify documentation confirms relapse status and that initial remission was achieved before coding this code
• •Distinguish from C94.01 (in remission) and C94.00 (not in remission) based on treatment response history

Clinical Significance

Acute erythroid leukemia in relapse represents one of the most challenging clinical scenarios in hematologic oncology, as this already-rare subtype demonstrates high resistance to salvage chemotherapy upon recurrence. Treatment options are limited and may include investigational agents or allogeneic stem cell transplantation if feasible.

Documentation Requirements

• ✓Documentation must establish prior remission followed by disease recurrence, with bone marrow findings showing recurrence of erythroid predominant blasts.
• ✓The time to relapse, current blast percentage, cytogenetic changes from original diagnosis, and planned salvage approach should all be documented.

Commonly Confused Codes