Q83Congenital malformations of breast

Q83 is the ICD-10-CM diagnosis code for congenital malformations of breast. It belongs to block Q80-Q89 (other congenital malformations) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Q83.0 (nipple), Q83.1 (breast), Q83.2 (nipple), Q83.3 (nipple), Q83.8 (breast) and Q83.9 (unspecified).

The conditions in its Excludes2 note aren't part of Q83, but may be coded alongside it if the patient has both: absence of pectoral muscle (Q79.8), hypoplasia of breast (N64.82) and micromastia (N64.82).

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