Mild vulvar dysplasia

This code represents a low-grade squamous intraepithelial lesion (LSIL) of the vulva, characterized by mild cellular atypia and disordered maturation confined to the lower third of the epithelium. It is a precancerous condition, but with a low potential for progression to invasive carcinoma.

Use this code for documented cases of mild vulvar dysplasia, often identified through biopsy following abnormal findings on physical examination or colposcopy. Supporting documentation should clearly state "mild dysplasia," "low-grade squamous intraepithelial lesion (LSIL) of the vulva," or "vulvar intraepithelial neoplasia (VIN) I."

• Do not use this code for moderate or severe vulvar dysplasia; these have distinct codes.
• Ensure the documentation specifies the vulva as the anatomical site, as dysplasia can occur in other genital areas.
• If the dysplasia has progressed to carcinoma in situ or invasive carcinoma, a more specific code for malignancy should be used.