Malignant melanoma of left ear and external auricular canal

This code signifies a cancerous tumor originating from melanocytes, specifically located on the left outer ear or within the external auditory canal. It indicates a primary malignant neoplasm of the skin in this anatomical region.

Apply this code when documentation confirms a diagnosis of malignant melanoma affecting the left ear or its external canal. This typically follows a biopsy and pathological confirmation of melanoma in this specific location.

• Ensure laterality is clearly documented as "left" ear or external auricular canal.
• Distinguish from melanoma of the inner or middle ear, which would use different codes.
• Confirm the diagnosis is primary malignant melanoma, not a metastatic lesion to this site.