C4A - Merkel cell carcinoma
C4A.7 - Merkel cell carcinoma of lower limb, including hip
C4A.70 - Merkel cell carcinoma of unspecified lower limb, including hip
C4A.71 - Merkel cell carcinoma of right lower limb, including hip
C4A.72 - Merkel cell carcinoma of left lower limb, including hip