Left heart failure

This code represents a condition where the left ventricle of the heart is unable to pump sufficient blood to meet the body's metabolic demands, leading to a backup of blood into the lungs. This results in pulmonary congestion and symptoms such as dyspnea, orthopnea, and paroxysmal nocturnal dyspnea. It is a form of congestive heart failure primarily affecting the left side of the heart.

Use this code when documentation explicitly states "left heart failure," "left ventricular failure," or "pulmonary edema due to heart failure." It is appropriate for both acute and chronic presentations of left-sided cardiac decompensation. Supporting documentation should include clinical findings consistent with left ventricular dysfunction and pulmonary congestion.

• Distinguish carefully between left heart failure and biventricular or right heart failure; specific documentation is crucial.
• Always look for an underlying cause of the heart failure, such as ischemic heart disease or hypertension, and code it first if applicable.
• Avoid using this code for general "heart failure" without laterality specified, unless further clarification is unavailable.