Q23 — Congenital malformations of aortic and mitral valves
Not billable
Is Q23 billable?
No — Q23 is a non-billable header code. Q23 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath Q23.
Billable codes under this header
- 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
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
- Q23.81Bicuspid aortic valve
- Q23.82Congenital mitral valve cleft leaflet
- Q23.88Other congenital malformations of aortic and mitral valves
Q23 at a glance
| Code | Q23 |
|---|---|
| Description | Congenital malformations of aortic and mitral valves |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q23, but a patient may have both at the same time. When documentation supports it, Q23 and the excluded code may both be reported.
- inborn errors of metabolism (E70-E88)
What codes fall under Q23? (7)
- 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 valvesnot billable
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
How long has Q23 existed?
Q23 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.