ICD-10-CM > C00-D49 > C43-C44 > C4A > C4A.7 C4A.7 Merkel cell carcinoma of lower limb, including hip Non-Billable/Non-Specific Codes C4A.70Merkel cell carcinoma of unspecified lower limb, including hipC4A.71Merkel cell carcinoma of right lower limb, including hipC4A.72Merkel cell carcinoma of left lower limb, including hip