| C4A.10 | Merkel cell carcinoma of unspecified eyelid, including canthus | BILLABLE CODE |
| C4A.11 | Merkel cell carcinoma of right eyelid, including canthus | NON-BILLABLE CODE |
| C4A.111 | Merkel cell carcinoma of right upper eyelid, including canthus | BILLABLE CODE |
| C4A.112 | Merkel cell carcinoma of right lower eyelid, including canthus | BILLABLE CODE |
| C4A.12 | Merkel cell carcinoma of left eyelid, including canthus | NON-BILLABLE CODE |
| C4A.121 | Merkel cell carcinoma of left upper eyelid, including canthus | BILLABLE CODE |
| C4A.122 | Merkel cell carcinoma of left lower eyelid, including canthus | BILLABLE CODE |
