Q23
Q23 — Congenital malformations of aortic and mitral valves
Non-billable headerICD-10-CM
Q23 is a non-billable header ICD-10-CM code for congenital malformations of aortic and mitral valves. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with Q23
These codes carry an Excludes1 note pointing at Q23. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q23 alone.
Risk adjustment
Q23 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 Q23
7 child codes. Green means billable.
- Q23.0Congenital stenosis of aortic valve
- Q23.1Congenital insufficiency of aortic valve
- Q23.2Congenital mitral stenosis
- Q23.3Congenital mitral insufficiency
- Q23.4Hypoplastic left heart syndrome
- Q23.8Other congenital malformations of aortic and mitral valves
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
Questions about Q23
- Is Q23 a billable ICD-10-CM code?
- No. Q23 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Q23 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).