Mammary duct ectasia of unspecified breast

This code represents a non-cancerous condition where the milk ducts beneath the nipple become dilated and their walls thicken, often leading to inflammation and fluid accumulation. It is characterized by ductal widening and periductal inflammation, which can result in nipple discharge, breast pain, or a palpable mass. This specific code is used when the affected breast is not specified in the medical record.

Use this code when documentation confirms a diagnosis of mammary duct ectasia but does not specify whether it affects the right or left breast. This diagnosis is often made based on clinical presentation, imaging findings (e.g., mammography, ultrasound), and sometimes biopsy. Supporting documentation should clearly state "mammary duct ectasia, unspecified breast" or similar.

• Do not use this code if the laterality (right or left breast) is documented; instead, select the more specific code (N60.41 or N60.42).
• Consider any associated symptoms (e.g., nipple discharge, breast pain) and code them separately if they are significant and not integral to the duct ectasia diagnosis.
• Ensure the documentation clearly differentiates mammary duct ectasia from other benign breast conditions, such as fibrocystic changes or mastitis.