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Q20 Congenital malformations of cardiac chambers and connections

ICD-10-CM category Q20 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 9 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in Q20

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

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