Basal cell carcinoma skin/ left ear and external auric canal

This code signifies a malignant neoplasm originating from the basal cells of the epidermis, specifically located on the skin of the left ear and extending into the external auditory canal. It represents the most common type of skin cancer, characterized by slow growth and a low metastatic potential.

Apply this code when documentation confirms a diagnosis of basal cell carcinoma affecting the left ear, including any involvement of the external auditory canal. This typically follows a biopsy and pathological confirmation of the tumor type and location.

• Ensure laterality is clearly documented as "left ear" to support this specific code.
• Distinguish from squamous cell carcinoma or melanoma of the ear, which have different code assignments.
• Verify if the lesion is primary or metastatic; this code is for a primary malignancy.