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Q23.0

Billable

Congenital stenosis of aortic valve

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A birth defect where the aortic valve (the valve that controls blood flow from the heart to the body) is abnormally narrow, restricting blood flow.

Coding Tips

  • •Document the severity of stenosis if available (mild, moderate, severe) as this may affect clinical management
  • •Distinguish from acquired aortic stenosis (I35.0) which develops later in life

Excludes 1 — Do NOT code together

  • congenital stenosis of aortic valve in hypoplastic left heart syndrome (Q23.4)
  • congenital subaortic stenosis (Q24.4)
  • supravalvular aortic stenosis (congenital) (Q25.3)

Code Hierarchy

└Q23Congenital malformations of aortic and mitral valves└Q23.0Congenital stenosis of aortic valve
└Q23.0Congenital stenosis of aortic valve

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