Malignant neoplasm of vestibule of mouth

This code identifies a primary cancerous tumor originating in the vestibule of the mouth. The vestibule is the area between the teeth and the inner surface of the lips and cheeks. This malignancy is a type of oral cancer.

Apply this code when documentation confirms a primary malignant neoplasm located specifically within the oral vestibule. This diagnosis is typically established through biopsy and histopathological examination. Use this code for initial encounters, active treatment, and surveillance of this specific cancer.

• Differentiate from other oral cavity sites; ensure documentation explicitly states "vestibule of mouth."
• Do not use for secondary or metastatic neoplasms; those require different codes.
• Sequence as the primary diagnosis when it is the reason for the encounter or treatment.