Sickle-cell thalassemia, unsp, with acute chest syndrome

This code represents a specific type of hemoglobinopathy where an individual inherits one gene for sickle cell disease and one gene for beta-thalassemia, complicated by the acute onset of chest pain, fever, and pulmonary infiltrates. Acute chest syndrome (ACS) is a severe and potentially life-threatening complication of sickle cell disease and related disorders, characterized by new pulmonary infiltrates on chest X-ray. The "unspecified" aspect indicates that the specific type of beta-thalassemia (e.g., beta-zero or beta-plus) is not documented.

Use this code for patients diagnosed with sickle-cell thalassemia who present with acute chest syndrome, as evidenced by clinical signs and symptoms (e.g., fever, cough, dyspnea, chest pain) and confirmed by new pulmonary infiltrates on imaging. Documentation should clearly state "sickle-cell thalassemia" and "acute chest syndrome." This code is appropriate when the specific type of thalassemia is not further specified in the medical record.

• Ensure documentation explicitly links the acute chest syndrome to the sickle-cell thalassemia.
• Do not use this code if the type of thalassemia (e.g., beta-zero, beta-plus) is specified; instead, use the more specific codes within the D57.4- subcategory.
• Sequence this code as the principal diagnosis when the acute chest syndrome is the reason for admission or primary encounter.