Q20
Congenital malformations of cardiac chambers and connections
Q20 is a non-billable ICD-10-CM code category for congenital malformations of cardiac chambers and connections. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Q20.0 Common arterial trunk, Q20.1 Double outlet right ventricle, Q20.2 Double outlet left ventricle, Q20.3 Discordant ventriculoarterial connection and 5 more. Its coding notes include 2 Excludes1 entries and 1 Excludes2 entry.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records
More specific codes under Q20 9
- Q20.0Common arterial trunkBillable
- Q20.1Double outlet right ventricleBillable
- Q20.2Double outlet left ventricleBillable
- Q20.3Discordant ventriculoarterial connectionBillable
- Q20.4Double inlet ventricleBillable
- Q20.5Discordant atrioventricular connectionBillable
- Q20.6Isomerism of atrial appendagesBillable
- Q20.8Other congenital malformations of cardiac chambers and connectionsBillable
- Q20.9Congenital malformation of cardiac chambers and connections, unspecifiedBillable