 Chung's areas of expertise include neurodevelopment disorders, autism, clinical genetics, developmental disorder, precision medicine, birth defects, breast cancer, cancer genetics, cardiomyopathy, cleft palate with cleft lip, congenital diaphragmatic hernia, congenital heart disease, diabetes, genetic counseling, inborn metabolism disorder, inherited arrhythmias, neurogenetics, obesity, pancreatic cancer, pediatric seizures, pulmonary hypertension, rare cancer syndromes, arrhythmia, seizures, and spinal muscular atrophy.Chung was named one of "New York Magazine"'s "best doctors" and one of America's "top doctors" by Castle Connolly Medical Ltd. in a survey conducted when more than 250,000 "leading doctors" were asked to "name America's best physicians in various specialties.