ICD-10-CM > C00-D49 > D00-D09 > D03 > D03.2 D03.2 Melanoma in situ of ear and external auricular canal Non-Billable/Non-Specific Codes D03.20Melanoma in situ of unspecified ear and external auricular canalD03.21Melanoma in situ of right ear and external auricular canalD03.22Melanoma in situ of left ear and external auricular canal