Melanoma in situ of unspecified lower limb, including hip

This code represents a non-invasive malignant melanoma confined to the epidermis (melanoma in situ) located on an unspecified part of the lower limb, which includes the hip region. It signifies that the melanoma cells have not invaded beyond the basement membrane.

Use this code when documentation confirms a diagnosis of melanoma in situ on any part of the lower extremity or hip, and the specific sub-site (e.g., thigh, calf, foot) is not specified. This code is appropriate when the pathology report clearly states "melanoma in situ" and the anatomical location is broadly defined as the lower limb or hip.

• Do not use this code if a more specific anatomical site on the lower limb or hip is documented (e.g., D03.71 for right lower limb, D03.72 for left lower limb).
• Ensure the pathology report explicitly states "in situ" to differentiate from invasive melanoma (C43.- series).
• This code is for the primary diagnosis; do not use for secondary or metastatic melanoma.