Is Q83 a billable ICD-10-CM code?

No. Q83 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q83 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Other congenital malformations (Q80-Q89).

Q83

Q83 — Congenital malformations of breast

Non-billable headerICD-10-CM

Q83 is a non-billable header ICD-10-CM code for congenital malformations of breast. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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

Other codes that can never be billed with Q83

These codes carry an Excludes1 note pointing at Q83. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q83 alone.

N64.82Hypoplasia of breast

Risk adjustment

Q83 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead Q83

6 child codes. Green means billable.

Questions about Q83

Is Q83 a billable ICD-10-CM code?: No. Q83 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q83 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Other congenital malformations (Q80-Q89).