Malignant neoplasm of labium minus

This code signifies a primary cancerous tumor originating in the labium minus, which is one of the inner folds of the vulva. It indicates the presence of a malignant growth requiring specific oncological management.

Apply this code when documentation clearly states a primary malignant neoplasm affecting the labium minus. This diagnosis is typically confirmed by biopsy and pathology reports. Use for initial encounters, subsequent treatment, and follow-up for this specific cancer.

• Ensure documentation specifies "labium minus" to differentiate from other vulvar sites.
• Do not confuse with malignant neoplasms of the labium majus (C51.0) or other specified parts of the vulva (C51.8).
• Always sequence as the primary diagnosis when it is the reason for the encounter, followed by any relevant secondary diagnoses or complications.