Squamous cell carcinoma skin/ r ear and external auric canal

This code signifies a malignant neoplasm originating from the squamous cells of the skin on the patient's right ear, specifically including the external auditory canal. This is a type of non-melanoma skin cancer that can be locally invasive and has the potential for metastasis if left untreated.

Apply this code when documentation confirms a diagnosis of squamous cell carcinoma affecting the skin of the right ear, including or specifically within the external auditory canal. Supporting documentation typically includes pathology reports confirming squamous cell carcinoma, as well as physician notes detailing the location of the lesion.

• Ensure laterality is clearly documented as "right ear" to avoid miscoding.
• Distinguish from basal cell carcinoma (C44.21-) or melanoma (C43.2-) of the ear, as these are distinct diagnoses.
• Confirm the primary site is the skin of the ear/external canal, not an underlying structure or metastatic lesion.