ICD-10-CM > C00-D49 > C43-C44 > C4A > C4A.1 > C4A.12 C4A.12 Merkel cell carcinoma of left eyelid, including canthus Non-Billable/Non-Specific Codes C4A.121Merkel cell carcinoma of left upper eyelid, including canthusC4A.122Merkel cell carcinoma of left lower eyelid, including canthus
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