D56.5

HCC Category Mapping

What This Code Means

A blood disorder where a person inherits hemoglobin E from one parent and a thalassemia gene from the other, causing mild to moderate anemia and abnormal red blood cells.

Coding Tips

• •Document whether the patient has hemoglobin E trait or disease to ensure accurate code selection
• •Verify the specific type of beta thalassemia component (thalassemia major, minor, or intermedia) when documented

Clinical Significance

Hemoglobin E-beta thalassemia is a compound heterozygous condition where one parent contributes a hemoglobin E gene and the other a beta thalassemia gene. It is the most common form of severe thalassemia worldwide, particularly prevalent in Southeast Asian populations. Clinical severity varies from asymptomatic to transfusion-dependent, depending on the beta thalassemia mutation type (beta-zero vs. beta-plus), making accurate characterization essential for management planning.

Documentation Requirements

• ✓Document the compound heterozygous state with hemoglobin electrophoresis showing hemoglobin E and elevated fetal hemoglobin, supported by genetic testing when available.
• ✓Specify clinical severity (mild, moderate, or severe/transfusion-dependent), hemoglobin levels, mean corpuscular volume, transfusion schedule, iron chelation therapy, and ferritin monitoring results.
• ✓Record complications including splenomegaly, iron overload, and endocrinopathies.

Commonly Confused Codes