Carcinoma in situ of skin of right lower limb, including hip

This code signifies the presence of non-invasive malignant epithelial cells confined to the epidermis (carcinoma in situ) on the skin of a patient's right lower limb, encompassing the hip region. It represents a very early stage of skin cancer where the abnormal cells have not yet invaded deeper tissues.

Apply this code when documentation explicitly states "carcinoma in situ" or "Bowen's disease" affecting the skin of the right lower extremity, including the hip. This diagnosis is typically confirmed by biopsy results showing intraepidermal malignancy without dermal invasion.

• Ensure the documentation specifies "in situ" to differentiate from invasive squamous cell carcinoma or melanoma.
• Verify laterality (right lower limb) is clearly documented; do not assume if not specified.
• This code is often a primary diagnosis when the carcinoma in situ is the reason for the encounter, such as for excision.