Q83.8

Other congenital malformations of breast

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from Q83Congenital malformations of breast

Excludes 2

absence of pectoral muscle (Q79.8) hypoplasia of breast (N64.82) micromastia (N64.82)

Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities

Excludes 2

inborn errors of metabolism (E70-E88)

Official Guidelines for Q83.8

I.C.17Chapter-specific guidanceChapter 17: Congenital malformations, deformations, and chromosomal abnormalities (Q00-QA1)

Sections that reference Q83.8

IV.QEncounters for routine health screeningsOutpatient services
… Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. …

Sections whose FY 2026 text names Q83.8, its Q83 category, or a range containing it — the chapter guidance above is the authoritative source.

Find Q83.8 in the alphabetic index

11 index paths lead to this code