The block Q20–Q28 of ICD-10 is titled “Congenital malformations of the circulatory system”. It is part of Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities, and holds 9 groups.
Codes in Q20–Q28
- 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
- Q22.0Pulmonary valve atresia
- Q22.1Congenital pulmonary valve stenosis
- Q22.2Congenital pulmonary valve insufficiency
- Q22.3Other congenital malformations of pulmonary valve
- Q22.4Congenital tricuspid stenosis
- Q22.5Ebstein anomaly
- Q22.6Hypoplastic right heart syndrome
- Q22.8Other congenital malformations of tricuspid valve
- Q22.9Congenital malformation of tricuspid valve, unspecified
- Q23.0Congenital stenosis of aortic valve
- Q23.1Congenital insufficiency of aortic valve
- Q23.2Congenital mitral stenosis
- Q23.3Congenital mitral insufficiency
- Q23.4Hypoplastic left heart syndrome
- Q23.8Other congenital malformations of aortic and mitral valves
- Q23.9Congenital malformation of aortic and mitral valves, unspecified
- Q25.0Patent ductus arteriosus
- Q25.1Coarctation of aorta
- Q25.2Atresia of aorta
- Q25.3Stenosis of aorta
- Q25.4Other congenital malformations of aorta
- Q25.5Atresia of pulmonary artery
- Q25.6Stenosis of pulmonary artery
- Q25.7Other congenital malformations of pulmonary artery
- Q25.8Other congenital malformations of great arteries
- Q25.9Congenital malformation of great arteries, unspecified
- Q26.0Congenital stenosis of vena cava
- Q26.1Persistent left superior vena cava
- Q26.2Total anomalous pulmonary venous connection
- Q26.3Partial anomalous pulmonary venous connection
- Q26.4Anomalous pulmonary venous connection, unspecified
- Q26.5Anomalous portal venous connection
- Q26.6Portal vein-hepatic artery fistula
- Q26.8Other congenital malformations of great veins
- Q26.9Congenital malformation of great vein, unspecified
- Q27.0Congenital absence and hypoplasia of umbilical artery
- Q27.1Congenital renal artery stenosis
- Q27.2Other congenital malformations of renal artery
- Q27.3Peripheral arteriovenous malformation
- Q27.4Congenital phlebectasia
- Q27.8Other specified congenital malformations of peripheral vascular system
- Q27.9Congenital malformation of peripheral vascular system, unspecified
- Q28.0Arteriovenous malformation of precerebral vessels
- Q28.1Other malformations of precerebral vessels
- Q28.2Arteriovenous malformation of cerebral vessels
- Q28.3Other malformations of cerebral vessels
- Q28.8Other specified congenital malformations of circulatory system
- Q28.9Congenital malformation of circulatory system, unspecified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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