Descending thoracic aortic aneurysm icd 10 cm July 8, 2019 16 32 64 128 6.7 cm descending thoracic aortic aneurysm icd 10 Icd 10 cm code for descending thoracic aortic aneurysm Thoracic aortic aneurysm icd 9 Aneurysmal dilatation of the ascending aorta icd 10