NPI Atlas

Q83 – Congenital malformations of breast

ICD-10-CM 2027 diagnosis code · Other congenital malformations

Non-billable header

ICD-10-CM code Q83

Code: Q83 (claims format: Q83)
Description: Congenital malformations of breast
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
Block: Q80-Q89 Other congenital malformations

Billable codes under Q83

Q83 is a header code and cannot be used on claims. Choose the most specific code:

Q83.0 – Congenital absence of breast with absent nippleBillable
Q83.1 – Accessory breastBillable
Q83.2 – Absent nippleBillable
Q83.3 – Accessory nippleBillable
Q83.8 – Other congenital malformations of breastBillable
Q83.9 – Congenital malformation of breast, unspecifiedBillable

Notes for Q83

Excludes2 (not included here):

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

Frequently asked questions

What is ICD-10 code Q83?

Q83 is the ICD-10-CM code for congenital malformations of breast, in the block Q80-Q89 (Other congenital malformations).

Is Q83 a billable code?

No. Q83 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.