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Q21.13

Billable

Coronary sinus atrial septal defect

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

What This Code Means

A birth defect where there is an abnormal opening in the wall between the upper heart chambers (atria) located near the coronary sinus, a vein that drains blood into the right atrium.

Coding Tips

  • •This is a specific type of atrial septal defect (ASD); do not use the unspecified code Q21.1 if this specific location is documented
  • •Verify documentation specifies coronary sinus location to distinguish from other sinus venosus defects

Code Hierarchy

└Q21Congenital malformations of cardiac septa└Q21.1Atrial septal defect└Q21.13Coronary sinus atrial septal defect
└Q21.13Coronary sinus atrial septal defect

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