N64.5Other signs and symptoms in breast

N64.5 is the ICD-10-CM diagnosis code for other signs and symptoms in breast. It belongs to category N64 (other disorders of breast), block N60-N65 (disorders of breast) and chapter 14 (diseases of the genitourinary system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within N64, choose N64.5 (Other signs and symptoms in breast) only when documentation doesn't support a more specific option: fissure and fistula of nipple (N64.0), fat necrosis of breast (N64.1), atrophy of breast (N64.2), Galactorrhea not associated with childbirth (N64.3), Mastodynia (N64.4), other specified disorders of breast (N64.8) and disorder of breast, unspecified (N64.9).

To report this condition, pick the subcode that matches the documentation: N64.51 (breast), N64.52 (discharge), N64.53 (nipple) and N64.59 (breast).

The conditions in its Excludes2 note aren't part of N64.5, but may be coded alongside it if the patient has both: abnormal findings on diagnostic imaging of breast (R92.-).

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