Stenosis of pulmonary artery

This code signifies a narrowing or obstruction within the pulmonary artery, the major blood vessel transporting deoxygenated blood from the heart to the lungs. This congenital anomaly can affect various segments of the pulmonary artery, including the main pulmonary artery, its branches, or the pulmonary valve. The degree of stenosis can range from mild to severe, impacting blood flow to the lungs.

Assign this code when documentation clearly indicates a diagnosis of pulmonary artery stenosis, whether isolated or as part of a more complex congenital heart defect. This diagnosis is typically established through echocardiography, cardiac catheterization, or other imaging studies. Supporting documentation should specify the location and severity of the stenosis if known.

• Differentiate from pulmonary valve stenosis (Q22.1), which is a separate anatomical obstruction.
• If part of a more complex congenital heart disease, code the primary condition first, then this code as an additional diagnosis.
• Ensure documentation specifies "pulmonary artery" to avoid confusion with other vascular stenoses.