Supplemental appendix

Table A1: Congenital heart defect severity categories with ICD-9-CM codesSevere defects

ICD-9-CM code Code description745.0 Common Truncus745.1 Transposition of the Great Arteries (TGA)745.10 Complete TGA (dextro-TGA), NOS, or classical745.11 DORV or incomplete TGA745.12 Corrected TGA (levo-TGA)745.19 TGA OS745.2 Tetralogy of Fallot745.3 Single Ventricle or cor triloculare745.6 Endocardial Cushion Defect (AVSD)745.60 Endocardial Cushion Defect (AVSD) unspecified745.61 ASD-1 (primum)745.69 Endocardial Cushion Defect (AVSD) other746.01 Pulmonary valve atresia or absence746.1 Tricuspid atresia, stenosis, or absence746.7 HLHS747.11 Interrupted aortic arch747.41 Total anomalous pulmonary venous return (TAPVR)

Non-severe defectsICD-9-CM code Code description745.4 VSD745.5 ASD2 or PFO745.7 Cor biloculare745.8 Other specified defect of septal closure745.9 Unspecified defect of septal closure746.0 Anomalies of pulmonary valve746.00 Pulmonary valve anomaly, unspecified746.02 Pulmonary valve stenosis746.09 Pulmonary valve anomaly, other746.2 Ebstein Anomaly746.3 Aortic valve stenosis746.4 Aortic insufficiency or bicuspid/unicuspid aortic valve746.5 Mitral stenosis or mitral valve abnormalities746.6 Mitral insufficiency746.8 Other specified anomalies of the heart746.81 Subaortic stenosis746.82 Cor triatrium746.83 Infundibular or subvalvar pulmonary stenosis746.84 Obstructive anomalies of the heart746.85 Coronary artery anomaly746.87 Malposition of heart or apex

746.89 Other specified anomaly of the heart (various types)746.9 Unspecified defect of the heart747.0 PDA747.1 Coarctation of aorta747.2 Other anomaly of the aorta747.20 Anomalies of aorta, unspecified747.21 Anomaly of aortic arch747.22 Atresia or stenosis of aorta747.29 Other anomaly of aorta747.3 Anomalies of Pulmonary artery747.31 Pulmonary artery atresia, coarctation, or hypoplasia747.39 Anomalies of Pulmonary artery, other747.4 Anomalies of great veins747.40 Anomalies of great veins, unspecified747.42 Partial anomalous venous return (PAPVR)747.49 Other anomalies of great veins747.9 Unspecified anomalies of circulatory system

Figure A1: One-way drive time from adolescent residential addresses to nearest pediatric cardiac surgical care center in southeastern New York

Figure A2: One-way drive time from adolescent residential addresses to nearest pediatric cardiac surgical care center in western New York

Figure A3: Public transit time from adolescent residential addresses to nearest pediatric cardiac surgical care center in southeastern New York

Figure A4: Public transit time from adolescent residential addresses to nearest pediatric cardiac surgical care center in western New York