Merkel cell carcinoma of unsp lower limb, including hip

This code signifies a malignant neoplasm originating from neuroendocrine cells, specifically Merkel cell carcinoma, located on an unspecified part of the lower limb, including the hip. It represents a rare but aggressive form of skin cancer.

Use this code when documentation confirms a diagnosis of Merkel cell carcinoma affecting any part of the lower extremity, including the hip, and the specific site within the lower limb is not further specified. This code is appropriate when the pathology report definitively identifies Merkel cell carcinoma.

• Ensure the pathology report explicitly states "Merkel cell carcinoma" and specifies a lower limb site.
• Avoid using this code if a more specific anatomical site on the lower limb (e.g., thigh, calf, foot) is documented; instead, use the appropriate subcategory.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is driving the primary treatment.