D57.40

HCC Category Mapping

What This Code Means

A blood disorder combining sickle cell disease with thalassemia (another inherited blood condition) without an acute crisis episode.

Coding Tips

• •This code is for stable disease without acute complications; if a crisis occurs, use a more specific code from D57.41x series
• •Document whether the patient is in steady state or experiencing complications to ensure correct code selection

Clinical Significance

Sickle-cell thalassemia without crisis represents the chronic baseline state of a compound heterozygous condition combining a sickle hemoglobin gene with a thalassemia gene. Clinical severity depends on whether the thalassemia component is beta-zero (no beta-globin production) or beta-plus (reduced beta-globin production). This unspecified code is used when the beta-zero vs. beta-plus distinction is not documented. Patients require ongoing monitoring for organ damage, pain management, and disease-modifying therapy.

Documentation Requirements

• ✓Document the sickle-cell thalassemia genotype confirmed by hemoglobin electrophoresis or genetic testing, and specify the thalassemia component as beta-zero or beta-plus when known.
• ✓Record baseline hemoglobin, reticulocyte count, current medications (hydroxyurea, folic acid), transfusion history, and screening for complications including retinopathy, avascular necrosis, renal dysfunction, and pulmonary hypertension.
• ✓Confirm no active crisis at the encounter.

Commonly Confused Codes