ICD-10-CM > I00-I99 > I70-I79 > I77 > I77.8 I77.8 Other specified disorders of arteries and arterioles Non-Billable/Non-Specific Codes I77.81Aortic ectasiaI77.810Thoracic aortic ectasiaI77.811Abdominal aortic ectasiaI77.812Thoracoabdominal aortic ectasiaI77.819Aortic ectasia, unspecified siteI77.82Antineutrophilic cytoplasmic antibody [ANCA] vasculitisI77.89Other specified disorders of arteries and arterioles