Is Q23 a billable code?
No. Q23 is a header code that groups 9 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
Q23: Congenital malformations of aortic and mitral valves
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
Q23 groups related diagnoses under congenital malformations of aortic and mitral valves. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under Q23
- 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
- Q23.81Bicuspid aortic valve
- Q23.82Congenital mitral valve cleft leaflet
- Q23.88Other congenital malformations of aortic and mitral valves
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
Q23 questions
What does Q23 mean?
Q23 is the ICD-10-CM code for Congenital malformations of aortic and mitral valves. It is in chapter 17, Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.