Malignant neoplasm of lower lip, vermilion border

This code signifies a cancerous growth originating specifically on the vermilion border of the lower lip. This is a primary malignancy, meaning it started in this location rather than spreading from another site. The vermilion border is the reddish, exposed part of the lip.

Apply this code when documentation clearly indicates a primary malignant neoplasm affecting the lower lip, with explicit mention of involvement of the vermilion border. This diagnosis is typically confirmed by biopsy and pathology reports. Use this code for initial encounters and subsequent treatment of this specific cancer.

• Differentiate from malignancies of the skin of the lip or inner surface (mucosa) of the lip, which have different code assignments.
• Ensure the documentation specifies "lower lip" and "vermilion border" to accurately assign this code.
• Do not use for secondary malignancies or carcinoma in situ; these have distinct ICD-9-CM codes.