Chronic systolic (congestive) heart failure

This code signifies a long-term condition where the heart's left ventricle is unable to pump enough blood to meet the body's needs due to impaired contractility. It reflects a persistent state of heart failure primarily characterized by a reduced ejection fraction.

Apply this code when documentation explicitly states "chronic systolic heart failure" or "chronic congestive heart failure with systolic dysfunction." This diagnosis is typically supported by echocardiogram findings showing a reduced left ventricular ejection fraction (LVEF) and clinical signs/symptoms of chronic heart failure.

• Differentiate from acute systolic heart failure (I50.21) or acute on chronic systolic heart failure (I50.23).
• Always query for acuity if not clearly documented (acute, chronic, or acute on chronic).
• Code any underlying causes of heart failure, such as ischemic heart disease, as additional diagnoses.