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Q24.4

Billable

Congenital subaortic stenosis

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

What This Code Means

A birth defect where tissue below the aortic valve narrows, restricting blood flow from the left ventricle to the aorta.

Coding Tips

  • •Distinguish this from aortic valve stenosis (Q23.0); subaortic stenosis is below the valve
  • •Document the gradient measurement from echocardiography if available

Code Hierarchy

└Q24Other congenital malformations of heart└Q24.4Congenital subaortic stenosis
└Q24.4Congenital subaortic stenosis

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