D57.212

HCC Category Mapping

What This Code Means

A blood disorder combining sickle cell disease and hemoglobin C disease where red blood cells become trapped in the spleen, causing it to enlarge and leading to severe anemia and organ dysfunction.

Coding Tips

• •Splenic sequestration is a medical emergency; verify documentation confirms acute sequestration event rather than chronic splenomegaly
• •This complication typically requires urgent medical intervention; ensure crisis status is clearly documented

Clinical Significance

Splenic sequestration in sickle-cell/Hemoglobin C disease is an important clinical distinction because Hemoglobin SC patients typically retain splenic function into adulthood (unlike Hemoglobin SS patients who undergo autosplenectomy in childhood). This means Hemoglobin SC patients are at risk for splenic sequestration crises throughout their lifetime, with sudden trapping of blood in the spleen causing acute anemia and potentially hypovolemic shock.

Documentation Requirements

• ✓Documentation must confirm the Hemoglobin SC genotype and the diagnosis of acute splenic sequestration with evidence of rapid splenic enlargement, significant hemoglobin decline from baseline, and clinical signs of acute anemia.
• ✓Record splenic size on exam or imaging, hemoglobin trend, reticulocyte count, platelet count (often decreased due to splenic pooling), treatment including transfusion, and whether splenectomy is recommended.

Commonly Confused Codes