ICD-10-CM > C00-D49 > D00-D09 > D03 > D03.1 > D03.12 D03.12 Melanoma in situ of left eyelid, including canthus Non-Billable/Non-Specific Codes D03.121Melanoma in situ of left upper eyelid, including canthusD03.122Melanoma in situ of left lower eyelid, including canthus