ICD-10-CM > C00-D49 > C43-C44 > C44 > C44.2 > C44.22 C44.22 Squamous cell carcinoma of skin of ear and external auricular canal Non-Billable/Non-Specific Codes C44.221Squamous cell carcinoma of skin of unspecified ear and external auricular canalC44.222Squamous cell carcinoma of skin of right ear and external auricular canalC44.229Squamous cell carcinoma of skin of left ear and external auricular canal