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  3. Ch. Q00-QA0
  4. Sec. Q20-Q28
  5. Category Q20
Category Q20

Congenital malformations of cardiac chambers and connections

Clinical Classification Guidelines

Specific Diagnosis Codes

Common arterial trunk
Q20.0
Double outlet right ventricle
Q20.1
Double outlet left ventricle
Q20.2
Discordant ventriculoarterial connection
Q20.3
Double inlet ventricle
Q20.4
Discordant atrioventricular connection
Q20.5
Isomerism of atrial appendages
Q20.6
Other congenital malformations of cardiac chambers and connections
Q20.8
Congenital malformation of cardiac chambers and connections, unspecified
Q20.9
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Data updated for October 2025 release.

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