ICD-10-CM > I00-I99 > I70-I79 > I71 > I71.0 I71.0 Dissection of aorta Non-Billable/Non-Specific Codes I71.00Dissection of unspecified site of aortaI71.01Dissection of thoracic aortaI71.010Dissection of ascending aortaI71.011Dissection of aortic archI71.012Dissection of descending thoracic aortaI71.019Dissection of thoracic aorta, unspecifiedI71.02Dissection of abdominal aortaI71.03Dissection of thoracoabdominal aorta