Moderate vulvar dysplasia

This code represents a precancerous condition of the vulva characterized by abnormal cell growth that is more severe than mild dysplasia but has not yet progressed to carcinoma in situ or invasive cancer. It indicates a significant architectural disorganization and cellular atypia within the vulvar epithelium.

Use this code when documentation explicitly states "moderate vulvar dysplasia" or "vulvar intraepithelial neoplasia (VIN) II." This diagnosis is typically made following a biopsy of the vulvar tissue. Ensure the pathology report confirms the moderate grade of dysplasia.

• Differentiate from N90.0 (mild vulvar dysplasia) and N90.2 (severe vulvar dysplasia without mention of high grade).
• Always confirm the grade of dysplasia from the pathology report; do not assume based on clinical notes alone.
• Consider sequencing this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if the patient is being treated for a related condition.