Malignant neoplasm of lower lip, inner aspect

This code signifies a cancerous growth originating from the mucosal lining on the inside surface of the lower lip. It specifically identifies a primary malignant tumor affecting this particular anatomical site.

Apply this code when documentation clearly indicates a confirmed diagnosis of squamous cell carcinoma or other primary malignancy located on the inner aspect of the lower lip. Pathological confirmation of malignancy is typically required to support its use.

• Differentiate from malignancies of the outer lip (vermilion border or skin), which are coded elsewhere.
• Ensure the documentation specifies "inner aspect" or "mucosa" of the lower lip to avoid miscoding.
• Do not use for secondary or metastatic neoplasms; this code is for primary site malignancy only.