All ICD10 Codes
Q20Non-billable

Congenital malformations of cardiac chambers and connections

Congenital Malformations, Deformations and Chromosomal Abnormalities·Congenital malformations of the circulatory system (Q20-Q28)·category·FY 2026

Use a more specific code (9 billable)
Q20.0Common arterial trunkQ20.1Double outlet right ventricleQ20.2Double outlet left ventricleQ20.3Discordant ventriculoarterial connectionQ20.4Double inlet ventricleQ20.5Discordant atrioventricular connectionQ20.6Isomerism of atrial appendagesQ20.8Other congenital malformations of cardiac chambers and connectionsQ20.9Congenital malformation of cardiac chambers and connections, unspecified

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • dextrocardia with situs inversus (Q89.3)
  • mirror-image atrial arrangement with situs inversus (Q89.3)

Clinical Hierarchy

BillableHas subcodes
CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q20-Q28Congenital malformations of the circulatory system (Q20-Q28)
Q20Congenital malformations of cardiac chambers and connectionsNot billable
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

MS-DRG Classification

2026

No direct MS-DRG triggers identified.