Malignant neoplasm of ventral surface of tongue

This code identifies a primary cancerous tumor originating on the underside of the tongue. This specific location is distinct from other parts of the tongue, such as the tip, dorsal surface, or base. The malignancy involves uncontrolled growth of abnormal cells in this region.

Apply this code when documentation clearly specifies a malignant neoplasm located on the ventral surface of the tongue. This diagnosis is typically made following biopsy and histopathological confirmation. Supporting documentation would include pathology reports, physician notes detailing the tumor's exact location, and imaging studies.

• Differentiate carefully between the ventral surface and other anatomical subsites of the tongue (e.g., tip, dorsal surface, lateral border, base) to ensure accurate coding.
• Always confirm the primary nature of the malignancy; if metastatic, a secondary site code would be appropriate.
• Review pathology reports for definitive confirmation of malignancy and precise anatomical location.