{"code":"Q21","type":"category","title":"Congenital malformations of cardiac septa","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["acquired cardiac septal defect (I51.0)"],"excludes2":[],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true},"sibling_codes":["Q21.0","Q21.1","Q21.2","Q21.3","Q21.4","Q21.8","Q21.9"],"inclusionTerms":[],"sibling_titles":{"code":"Q21.9","title":"Congenital malformation of cardiac septum, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Congenital malformations of cardiac septa is a non-billable ICD-10-CM category code (Q21). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","officialDefinition":"Congenital malformations of cardiac septa is a non-billable ICD-10-CM category code (Q21). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[{"code":"Q21.0","title":"Ventricular septal defect","description":"Ventricular septal defect is a billable ICD-10-CM diagnosis code (Q21.0). Inclusion terms: Roger's disease. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.0-ventricular-septal-defect"},{"code":"Q21.1","title":"Atrial septal defect","description":"Atrial septal defect is a non-billable ICD-10-CM category code (Q21.1). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":false,"slug":"q21.1-atrial-septal-defect"},{"code":"Q21.10","title":"Atrial septal defect, unspecified","description":"Atrial septal defect, unspecified is a billable ICD-10-CM diagnosis code (Q21.10). Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.10-atrial-septal-defect-unspecified"},{"code":"Q21.11","title":"Secundum atrial septal defect","description":"Secundum atrial septal defect is a billable ICD-10-CM diagnosis code (Q21.11). Inclusion terms: Fenestrated atrial septum; Patent or persistent ostium secundum defect (type II). Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.11-secundum-atrial-septal-defect"},{"code":"Q21.12","title":"Patent foramen ovale","description":"Patent foramen ovale is a billable ICD-10-CM diagnosis code (Q21.12). Inclusion terms: Persistent foramen ovale. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.12-patent-foramen-ovale"},{"code":"Q21.13","title":"Coronary sinus atrial septal defect","description":"Coronary sinus atrial septal defect is a billable ICD-10-CM diagnosis code (Q21.13). Inclusion terms: Coronary sinus defect; Unroofed coronary sinus. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.13-coronary-sinus-atrial-septal-defect"},{"code":"Q21.14","title":"Superior sinus venosus atrial septal defect","description":"Superior sinus venosus atrial septal defect is a billable ICD-10-CM diagnosis code (Q21.14). Inclusion terms: Superior vena cava type atrial septal defect. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.14-superior-sinus-venosus-atrial-septal-defect"},{"code":"Q21.15","title":"Inferior sinus venosus atrial septal defect","description":"Inferior sinus venosus atrial septal defect is a billable ICD-10-CM diagnosis code (Q21.15). Inclusion terms: Inferior vena cava type atrial septal defect. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.15-inferior-sinus-venosus-atrial-septal-defect"},{"code":"Q21.16","title":"Sinus venosus atrial septal defect, unspecified","description":"Sinus venosus atrial septal defect, unspecified is a billable ICD-10-CM diagnosis code (Q21.16). Inclusion terms: Sinus venosus defect, NOS. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.16-sinus-venosus-atrial-septal-defect-unspecified"},{"code":"Q21.19","title":"Other specified atrial septal defect","description":"Other specified atrial septal defect is a billable ICD-10-CM diagnosis code (Q21.19). Inclusion terms: Common atrium; Other specified atrial septal abnormality. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Excludes2 (not included here): ostium primum atrial septal defect (type I) (Q21.20).","isBillable":true,"slug":"q21.19-other-specified-atrial-septal-defect"},{"code":"Q21.2","title":"Atrioventricular septal defect","description":"Atrioventricular septal defect is a non-billable ICD-10-CM category code (Q21.2). A more specific billable subcode must be selected for claims submission. Inclusion terms: Atrioventricular canal defect; Endocardial cushion defect; Ostium primum atrial septal defect (type I). Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":false,"slug":"q21.2-atrioventricular-septal-defect"},{"code":"Q21.20","title":"Atrioventricular septal defect, unspecified as to partial or complete","description":"Atrioventricular septal defect, unspecified as to partial or complete is a billable ICD-10-CM diagnosis code (Q21.20). Inclusion terms: Atrioventricular canal, NOS; Endocardial cushion defect NOS; Ostium primum atrial septal defect (type I) NOS. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.20-atrioventricular-septal-defect-unspecified-as-to-partial-or-complete"},{"code":"Q21.21","title":"Partial atrioventricular septal defect","description":"Partial atrioventricular septal defect is a billable ICD-10-CM diagnosis code (Q21.21). Inclusion terms: Incomplete atrioventricular canal; Incomplete atrioventricular septal defect; Incomplete endocardial cushion defect; Ostium primum atrial septal defect (type I) with separate atrioventricular valves; Partial atrioventricular canal; Partial endocardial cushion defect. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.21-partial-atrioventricular-septal-defect"},{"code":"Q21.22","title":"Transitional atrioventricular septal defect","description":"Transitional atrioventricular septal defect is a billable ICD-10-CM diagnosis code (Q21.22). Inclusion terms: Intermediate atrioventricular canal; Intermediate atrioventricular septal defect; Intermediate endocardial cushion defect; Ostium primum atrial septal defect (type I) with separate atrioventricular valves and a small or restrictive inlet VSD; Transitional atrioventricular canal; Transitional endocardial cushion defect. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.22-transitional-atrioventricular-septal-defect"},{"code":"Q21.23","title":"Complete atrioventricular septal defect","description":"Complete atrioventricular septal defect is a billable ICD-10-CM diagnosis code (Q21.23). Inclusion terms: Common atrioventricular canal; Common atrioventricular septal defect; Common endocardial cushion defect; Ostium primum atrial septal defect (type I) with common atrioventricular valve and a moderate or larger inlet VSD. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.23-complete-atrioventricular-septal-defect"},{"code":"Q21.3","title":"Tetralogy of Fallot","description":"Tetralogy of Fallot is a billable ICD-10-CM diagnosis code (Q21.3). Inclusion terms: Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.3-tetralogy-of-fallot"},{"code":"Q21.4","title":"Aortopulmonary septal defect","description":"Aortopulmonary septal defect is a billable ICD-10-CM diagnosis code (Q21.4). Inclusion terms: Aortic septal defect; Aortopulmonary window. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.4-aortopulmonary-septal-defect"},{"code":"Q21.8","title":"Other congenital malformations of cardiac septa","description":"Other congenital malformations of cardiac septa is a billable ICD-10-CM diagnosis code (Q21.8). Inclusion terms: Eisenmenger's defect; Pentalogy of Fallot. Excludes1 (not coded here): acquired cardiac septal defect (I51.0). Code also: , if applicable:; Eisenmenger's complex (I27.83); Eisenmenger's syndrome (I27.83).","isBillable":true,"slug":"q21.8-other-congenital-malformations-of-cardiac-septa"},{"code":"Q21.9","title":"Congenital malformation of cardiac septum, unspecified","description":"Congenital malformation of cardiac septum, unspecified is a billable ICD-10-CM diagnosis code (Q21.9). Inclusion terms: Septal (heart) defect NOS. Excludes1 (not coded here): acquired cardiac septal defect (I51.0).","isBillable":true,"slug":"q21.9-congenital-malformation-of-cardiac-septum-unspecified"}],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}