Melanoma in situ of left lower limb, including hip

This code signifies a non-invasive malignant melanoma confined to the epidermis (in situ) located on the left lower extremity, encompassing the hip region. It indicates that the cancerous cells have not yet invaded deeper tissues.

Apply this code when documentation confirms a diagnosis of melanoma in situ specifically on the left lower limb, including the hip. This diagnosis is typically supported by a pathology report following a biopsy or excision.

• Ensure the pathology report explicitly states "in situ" and specifies the left lower limb or hip.
• Do not use this code for invasive melanoma; refer to the C43 series for invasive lesions.
• Laterality is crucial; confirm the lesion is on the left lower limb.