Acute cor pulmonale

This code signifies the sudden onset of right heart failure due to a primary disorder of the lungs or pulmonary vasculature. It represents an acute increase in pulmonary artery pressure leading to right ventricular dysfunction. The condition is typically severe and life-threatening.

Assign this code when documentation clearly indicates acute right ventricular strain or failure directly attributable to a pulmonary condition, such as a massive pulmonary embolism or severe acute respiratory distress syndrome (ARDS). Supporting documentation should detail the acute nature of the onset and the causal link to the underlying lung pathology.

• Differentiate from chronic cor pulmonale (416.0), which involves gradual right heart changes.
• Always code the underlying pulmonary condition causing the acute cor pulmonale first, as this is a manifestation of that primary disease.
• Look for terms like "acute right heart strain," "acute right ventricular failure secondary to pulmonary hypertension," or "pulmonary embolism with acute cor pulmonale."