C43.21
ICD-10-CMThis code signifies a primary malignant melanoma originating in the skin of the right ear or within the external auditory canal. It represents a serious form of skin cancer characterized by uncontrolled growth of melanocytes in this specific anatomical location.
Apply this code when documentation confirms a biopsy-proven or clinically diagnosed malignant melanoma affecting the right ear or external auricular canal. This code is appropriate for initial diagnosis, treatment, and follow-up encounters for this specific primary tumor site.
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