Q83.9 ICD-10-CA code: Congenital malformation of breast, unspecified
Q83.9 is the ICD-10-CA code for “Congenital malformation of breast, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
Q83.9Congenital malformation of breast, unspecified
Short description: Congenital malformation of breast NOS
ICD-10-CA · Canada · Also written Q839
Index terms
Entries in CIHI’s alphabetical index that lead to Q83.9. Searching the index by the condition the note names is how coders reach this code.
- Deformity, nipple (congenital)
- Deformity, breast (acquired), congenital
- Anomaly, anomalous (congenital) (unspecified type), breast
- Anomaly, anomalous (congenital) (unspecified type), nipple
Notes for Q83.9
As CIHI prints them, with any note Q83.9 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Absence of pectoral muscle (Q79.8)From Q83 Congenital malformations of breast
- Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Where Q83.9 sits
- 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- 2Block Q80-Q89Other congenital malformations
- 3Category Q83Congenital malformations of breast
- 4Valid code Q83.9Congenital malformation of breast, unspecified
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code Q83.9 mean?
Q83.9 is the ICD-10-CA code for “Congenital malformation of breast, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is Q83.9 in ICD-10-CA?
Q83.9 sits under Q83 Congenital malformations of breast, within Q80-Q89 Other congenital malformations, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
What coding notes apply to Q83.9?
ICD-10-CA lists Excludes notes for Q83.9, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.