ICD-10-CM > C00-D49 > D00-D09 > D04 > D04.1 > D04.12 D04.12 Carcinoma in situ of skin of left eyelid, including canthus Non-Billable/Non-Specific Codes D04.121Carcinoma in situ of skin of left upper eyelid, including canthusD04.122Carcinoma in situ of skin of left lower eyelid, including canthus