ICD-10-CM > C00-D49 > C43-C44 > C43 > C43.1 > C43.12 C43.12 Malignant melanoma of left eyelid, including canthus Non-Billable/Non-Specific Codes C43.121Malignant melanoma of left upper eyelid, including canthusC43.122Malignant melanoma of left lower eyelid, including canthus