I28 Other diseases of pulmonary vesselsNon-billable header with 4 child codes.
I28.0 Arteriovenous fistula of pulmonary vesselsI28.1 Aneurysm of pulmonary arteryI28.8 Other diseases of pulmonary vesselsI28.9 Disease of pulmonary vessels, unspecifiedI77 Other disorders of arteries and arterioles ("pulmonary artery (I28.-)")I77 Other disorders of arteries and arterioles ("pulmonary artery (I28.-)")