Malignant neoplasm of labium majus

This code identifies a primary cancerous tumor originating in the labium majus, the larger, outer folds of the vulva. This malignancy involves uncontrolled growth of abnormal cells within the tissues of this specific external female genital structure.

Apply this code when documentation clearly states a primary malignant neoplasm is located in the labium majus. This is appropriate for initial diagnoses, active treatment, or follow-up care for this specific cancer. Pathology reports confirming malignancy and precise anatomical location are essential for accurate coding.

• Ensure documentation specifies "labium majus" and not other vulvar sites (e.g., labium minus, clitoris) to avoid miscoding.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless specific coding guidelines dictate otherwise (e.g., complications of pregnancy).
• Review the pathology report carefully to confirm the primary nature of the tumor; metastatic lesions to this site would be coded differently.