ICD-10-CM > I00-I99 > I70-I79 > I77 > I77.6 I77.6 Arteritis, unspecified Billable/Specific Copy Code Copy Description Applicable To Aortitis NOSEndarteritis NOS Type 1 Excludes arteritis or endarteritis:aortic arch (M31.4)cerebral NEC (I67.7)coronary (I25.89)deformans (I70.-)giant cell (M31.5, M31.6)obliterans (I70.-)senile (I70.-)