ICD-10 code for mammary duct ectasia

The ICD-10-CM code for mammary duct ectasia is N60.4 (Mammary duct ectasia).

Within N60 (benign mammary dysplasia), N60.4 is specifically for mammary duct ectasia. Related codes cover Solitary cyst of breast (N60.0), diffuse cystic mastopathy (N60.1), Fibroadenosis of breast (N60.2), fibrosclerosis of breast (N60.3), other benign mammary dysplasias (N60.8) and unspecified benign mammary dysplasia (N60.9).

To report this condition, pick the subcode that matches the documentation: N60.41 (of right breast), N60.42 (of left breast) and N60.49 (of unspecified breast).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.