Q21.20
BillableAtrioventricular septal defect, unspecified as to partial or complete
HCC Category Mapping
RxHCCHCC 191 — Congenital Heart/Circulatory Disorders and Fontan Circulation
0.000What This Code Means
A birth defect where there is an abnormal opening in the wall between the upper and lower heart chambers, but it is not specified whether the defect is partial or complete.
Coding Tips
- •This is an unspecified code; query the provider for clarification on whether the defect is partial or complete to allow for more specific coding
- •Review echocardiogram reports or surgical findings to determine the extent of the defect
Clinical Significance
Atrioventricular septal defect represents a complex heart malformation involving abnormal development of the central heart structures, potentially affecting all four chambers. This condition requires careful assessment to determine the extent of involvement and appropriate surgical planning.
Documentation Requirements
- ✓Echocardiographic assessment of septal defect extent
- ✓Evaluation of atrioventricular valve involvement
- ✓Assessment of both atrial and ventricular components
- ✓Hemodynamic significance and shunt assessment
- ✓Associated cardiac anomalies
- ✓Need for surgical intervention
- ✓Current cardiac function and symptoms
- ✓Growth and development monitoring
Commonly Confused Codes
Code Hierarchy
└Q21Congenital malformations of cardiac septa└Q21.2Atrioventricular septal defect└Q21.20Atrioventricular septal defect, unspecified as to partial or complete
└Q21.20Atrioventricular septal defect, unspecified as to partial or complete