Oth malig neoplasm skin/ unsp ear and external auric canal

This code signifies a malignant tumor originating from the skin of the ear or external auditory canal, where the specific type of skin cancer is not basal cell carcinoma, squamous cell carcinoma, or melanoma. It represents other less common forms of skin malignancy affecting this anatomical site. The exact location on the ear (e.g., helix, lobule) is not specified.

Apply this code when documentation clearly indicates a malignant neoplasm of the skin of the ear or external auditory canal, and the pathology report identifies it as something other than basal cell, squamous cell, or melanoma. This code is appropriate when the laterality (left or right ear) is not documented. Supporting documentation includes pathology reports, operative notes, and physician progress notes detailing the diagnosis.

• Ensure the pathology report specifies a malignant skin neoplasm that is not basal cell, squamous cell, or melanoma.
• If the laterality (left or right ear) is known, a more specific code from the C44.2 series should be used.
• Always sequence this code after any primary malignancy if this represents a secondary or metastatic site, or as the primary diagnosis if it is the focus of the encounter.