D57.454

HCC Category Mapping

What This Code Means

This is a blood disorder where a person has both sickle cell disease and a milder form of thalassemia, and they are currently experiencing painful swelling in their fingers or toes (dactylitis). This combination of genetic blood disorders causes abnormal hemoglobin that leads to pain crises and tissue damage.

Coding Tips

• •Verify documentation specifies both sickle-cell thalassemia beta plus AND the presence of dactylitis; if dactylitis is not documented, use a different D57.45x code without the dactylitis component
• •Ensure the fifth character '4' is correct for beta plus thalassemia; other fifth characters (0-3) represent different thalassemia types and should not be confused

Clinical Significance

Dactylitis in sickle-cell thalassemia beta plus is typically milder and may present later in childhood compared to Hemoglobin SS or beta-zero genotypes. Because the beta-plus phenotype is generally milder, dactylitis may be less frequent but still serves as an important early clinical sign that can lead to the initial diagnosis of sickle-cell thalassemia in young children.

Documentation Requirements

• ✓Documentation must confirm sickle-cell thalassemia beta plus genotype and the diagnosis of dactylitis with identification of affected extremities.
• ✓Record pain assessment, swelling characteristics, any imaging findings, treatment administered, and clinical course.
• ✓Note the patient's age and whether this led to sickle cell disease diagnosis.

Commonly Confused Codes