D59.12
BillableCold autoimmune hemolytic anemia
HCC Category Mapping
What This Code Means
Anemia caused by antibodies that attack red blood cells primarily in cold temperatures, causing them to clump and break down, often triggered by cold exposure.
Coding Tips
- •Document temperature-related triggers and patient's response to cold exposure
- •Note if associated with infections like mycoplasma or Epstein-Barr virus
Clinical Significance
Cold autoimmune hemolytic anemia (cold agglutinin disease) is caused by immunoglobulin M autoantibodies that bind to red blood cells at temperatures below body temperature, typically at 0-4 degrees Celsius, activating the complement cascade and causing intravascular and extravascular hemolysis. Symptoms worsen with cold exposure and may include acrocyanosis (blue discoloration of extremities), Raynaud-like phenomena, and hemoglobinuria. Primary cold agglutinin disease is a clonal B-cell lymphoproliferative disorder, while secondary forms occur with infections (Mycoplasma pneumoniae, Epstein-Barr virus) or lymphomas.
Documentation Requirements
- ✓Document elevated cold agglutinin titers and positive direct antiglobulin test showing complement (C3d) coating.
- ✓Record hemoglobin levels, hemolysis markers, and any evidence of complement activation.
- ✓Document whether the condition is primary (clonal) or secondary to infection or lymphoproliferative disease.
- ✓Include cold exposure triggers, presence of acrocyanosis or Raynaud phenomena, and treatment with cold avoidance, rituximab, or complement inhibitors.
- ✓Code any underlying associated condition separately.