Preauricular sinus and cyst

This code represents a congenital anomaly characterized by a small pit or tract located anterior to the ear canal, often lined with squamous epithelium. It can present as an asymptomatic dimple or develop into a cyst or abscess due to retained debris and infection.

Apply this code when documentation specifies a preauricular sinus, pit, or cyst. This includes both uncomplicated presentations and those with associated inflammation or infection, provided the primary diagnosis remains the congenital anomaly. Supporting documentation includes physical exam findings, imaging reports, or surgical pathology.

• Differentiate from other ear anomalies; this code is specific to the preauricular region.
• If an infection or abscess is present, code the infection/abscess separately as a secondary diagnosis.
• Ensure documentation clearly states "preauricular" to avoid confusion with other ear or facial cysts.