D56.4

HCC Category Mapping

What This Code Means

A rare genetic condition where a person continues to produce fetal hemoglobin into adulthood instead of switching to adult hemoglobin. This is usually benign and causes little to no health problems.

Coding Tips

• •HPFH is typically a benign finding discovered incidentally on hemoglobin electrophoresis
• •Document whether this is causing any clinical symptoms or complications

Clinical Significance

Hereditary persistence of fetal hemoglobin is a benign genetic condition where fetal hemoglobin production continues into adulthood at elevated levels instead of being silenced after infancy. Unlike thalassemia syndromes, globin chain production is balanced, so there is no significant anemia or hemolysis. This condition is most commonly discovered incidentally on hemoglobin electrophoresis and is clinically important primarily for genetic counseling and distinguishing from pathologic hemoglobin disorders.

Documentation Requirements

• ✓Documentation should include hemoglobin electrophoresis results showing elevated fetal hemoglobin levels (typically 15-30% in heterozygotes, near 100% in homozygotes), normal or near-normal hemoglobin and mean corpuscular volume, and absence of significant anemia or hemolysis.
• ✓Genetic testing results should be recorded if available.
• ✓Document that the condition is clinically benign and does not require treatment, and note its relevance for genetic counseling.

Commonly Confused Codes