ICD-10-CM · Chapter 17 · Q00-QA1
Q20 Congenital malformations of cardiac chambers and connections
Excludes 1 (cannot be coded together)
- dextrocardia with situs inversus (Q89.3)
- mirror-image atrial arrangement with situs inversus (Q89.3)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| Q20..0 | Common arterial trunk | Yes |
| Q20..1 | Double outlet right ventricle | Yes |
| Q20..2 | Double outlet left ventricle | Yes |
| Q20..3 | Discordant ventriculoarterial connection | Yes |
| Q20..4 | Double inlet ventricle | Yes |
| Q20..5 | Discordant atrioventricular connection | Yes |
| Q20..6 | Isomerism of atrial appendages | Yes |
| Q20..8 | Other congenital malformations of cardiac chambers and connections | Yes |
| Q20..9 | Congenital malformation of cardiac chambers and connections, unspecified | Yes |
Last reviewed: September 2026