ICD-10-CM > C00-D49 > C43-C44 > C44 > C44.2 > C44.21 C44.21 Basal cell carcinoma of skin of ear and external auricular canal Non-Billable/Non-Specific Codes C44.211Basal cell carcinoma of skin of unspecified ear and external auricular canalC44.212Basal cell carcinoma of skin of right ear and external auricular canalC44.219Basal cell carcinoma of skin of left ear and external auricular canal