About Section Q20-Q28

Section Q20-Q28 covers Congenital malformations of the circulatory system within Chapter 17 of the ICD-10-CM Tabular List. This section includes diagnosis codes ranging from Q20 to Q28. Each code below includes its description, billable status, and links to detailed coding guidelines.
Diagnosis Codes 118 entries
Q20Congenital malformations of cardiac chambers and connectionsNon-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›Q21Congenital malformations of cardiac septaNon-Billable›Q21.0Ventricular septal defectBillable›Q21.1Atrial septal defectNon-Billable›Q21.10Atrial septal defect, unspecifiedBillable›Q21.11Secundum atrial septal defectBillable›Q21.12Patent foramen ovaleBillable›Q21.13Coronary sinus atrial septal defectBillable›Q21.14Superior sinus venosus atrial septal defectBillable›Q21.15Inferior sinus venosus atrial septal defectBillable›Q21.16Sinus venosus atrial septal defect, unspecifiedBillable›Q21.19Other specified atrial septal defectBillable›Q21.2Atrioventricular septal defectNon-Billable›Q21.20Atrioventricular septal defect, unspecified as to partial or completeBillable›Q21.21Partial atrioventricular septal defectBillable›Q21.22Transitional atrioventricular septal defectBillable›Q21.23Complete atrioventricular septal defectBillable›Q21.3Tetralogy of FallotBillable›Q21.4Aortopulmonary septal defectBillable›Q21.8Other congenital malformations of cardiac septaBillable›Q21.9Congenital malformation of cardiac septum, unspecifiedBillable›Q22Congenital malformations of pulmonary and tricuspid valvesNon-Billable›Q22.0Pulmonary valve atresiaBillable›Q22.1Congenital pulmonary valve stenosisBillable›Q22.2Congenital pulmonary valve insufficiencyBillable›Q22.3Other congenital malformations of pulmonary valveBillable›Q22.4Congenital tricuspid stenosisBillable›Q22.5Ebstein's anomalyBillable›Q22.6Hypoplastic right heart syndromeBillable›Q22.8Other congenital malformations of tricuspid valveBillable›Q22.9Congenital malformation of tricuspid valve, unspecifiedBillable›Q23Congenital malformations of aortic and mitral valvesNon-Billable›Q23.0Congenital stenosis of aortic valveBillable›Q23.1Congenital insufficiency of aortic valveBillable›Q23.2Congenital mitral stenosisBillable›Q23.3Congenital mitral insufficiencyBillable›Q23.4Hypoplastic left heart syndromeBillable›Q23.8Other congenital malformations of aortic and mitral valvesNon-Billable›Q23.81Bicuspid aortic valveBillable›Q23.82Congenital mitral valve cleft leafletBillable›Q23.88Other congenital malformations of aortic and mitral valvesBillable›Q23.9Congenital malformation of aortic and mitral valves, unspecifiedBillable›Q24Other congenital malformations of heartNon-Billable›Q24.0DextrocardiaBillable›Q24.1LevocardiaBillable›Q24.2Cor triatriatumBillable›Q24.3Pulmonary infundibular stenosisBillable›Q24.4Congenital subaortic stenosisBillable›Q24.5Malformation of coronary vesselsBillable›Q24.6Congenital heart blockBillable›Q24.8Other specified congenital malformations of heartBillable›Q24.9Congenital malformation of heart, unspecifiedBillable›Q25Congenital malformations of great arteriesNon-Billable›Q25.0Patent ductus arteriosusBillable›Q25.1Coarctation of aortaBillable›Q25.2Atresia of aortaNon-Billable›Q25.21Interruption of aortic archBillable›Q25.29Other atresia of aortaBillable›Q25.3Supravalvular aortic stenosisBillable›Q25.4Other congenital malformations of aortaNon-Billable›Q25.40Congenital malformation of aorta unspecifiedBillable›Q25.41Absence and aplasia of aortaBillable›Q25.42Hypoplasia of aortaBillable›Q25.43Congenital aneurysm of aortaBillable›Q25.44Congenital dilation of aortaBillable›Q25.45Double aortic archBillable›Q25.46Tortuous aortic archBillable›Q25.47Right aortic archBillable›Q25.48Anomalous origin of subclavian arteryBillable›Q25.49Other congenital malformations of aortaBillable›Q25.5Atresia of pulmonary arteryBillable›Q25.6Stenosis of pulmonary arteryBillable›Q25.7Other congenital malformations of pulmonary arteryNon-Billable›Q25.71Coarctation of pulmonary arteryBillable›Q25.72Congenital pulmonary arteriovenous malformationBillable›Q25.79Other congenital malformations of pulmonary arteryBillable›Q25.8Other congenital malformations of other great arteriesBillable›Q25.9Congenital malformation of great arteries, unspecifiedBillable›Q26Congenital malformations of great veinsNon-Billable›Q26.0Congenital stenosis of vena cavaBillable›Q26.1Persistent left superior vena cavaBillable›Q26.2Total anomalous pulmonary venous connectionBillable›Q26.3Partial anomalous pulmonary venous connectionBillable›Q26.4Anomalous pulmonary venous connection, unspecifiedBillable›Q26.5Anomalous portal venous connectionBillable›Q26.6Portal vein-hepatic artery fistulaBillable›Q26.8Other congenital malformations of great veinsBillable›Q26.9Congenital malformation of great vein, unspecifiedBillable›Q27Other congenital malformations of peripheral vascular systemNon-Billable›Q27.0Congenital absence and hypoplasia of umbilical arteryBillable›Q27.1Congenital renal artery stenosisBillable›Q27.2Other congenital malformations of renal arteryBillable›Q27.3Arteriovenous malformation (peripheral)Non-Billable›Q27.30Arteriovenous malformation, site unspecifiedBillable›Q27.31Arteriovenous malformation of vessel of upper limbBillable›Q27.32Arteriovenous malformation of vessel of lower limbBillable›Q27.33Arteriovenous malformation of digestive system vesselBillable›Q27.34Arteriovenous malformation of renal vesselBillable›Q27.39Arteriovenous malformation, other siteBillable›Q27.4Congenital phlebectasiaBillable›Q27.8Other specified congenital malformations of peripheral vascular systemBillable›Q27.9Congenital malformation of peripheral vascular system, unspecifiedBillable›Q28Other congenital malformations of circulatory systemNon-Billable›Q28.0Arteriovenous malformation of precerebral vesselsBillable›Q28.1Other malformations of precerebral vesselsBillable›Q28.2Arteriovenous malformation of cerebral vesselsBillable›Q28.3Other malformations of cerebral vesselsBillable›Q28.8Other specified congenital malformations of circulatory systemBillable›Q28.9Congenital malformation of circulatory system, unspecifiedBillable›