I71.0Non-Billable (Header)Dissection of aortaChild CodesI71.00Dissection of unspecified site of aortaHCC 264I71.01Dissection of thoracic aortaI71.02Dissection of abdominal aortaHCC 264I71.03Dissection of thoracoabdominal aortaHCC 264Code Hierarchy└I71Aortic aneurysm and dissection└I71.0Dissection of aorta└I71.0Dissection of aorta