Mammary duct ectasia of right breast

This code signifies a non-cancerous condition of the right breast characterized by the widening and inflammation of the milk ducts, often leading to periductal fibrosis. It can present with nipple discharge, tenderness, or a palpable mass.

Apply this code when documentation explicitly states mammary duct ectasia affecting the right breast. Supporting clinical notes should detail diagnostic findings such as imaging (mammogram, ultrasound) or physical examination findings consistent with duct ectasia.

• Ensure laterality is clearly documented; do not use this code for bilateral or unspecified breast involvement.
• Distinguish from other benign breast conditions like fibrocystic changes or mastitis, which have different codes.
• Code any associated symptoms (e.g., nipple discharge, breast pain) separately as secondary diagnoses if documented.