Saccular aneurysm of the descending thoracic aorta icd 10 July 8, 2019 16 32 64 128 Thoracic aortic aneurysm icd 9 Thoracic aortic aneurysm icd 10 Ascending aorta aneurysm icd 10 code Aneurysmal dilatation of the ascending aorta icd 10