Ludomirsky AB, et al. - Researchers conducted this cross-sectional study to evaluate the national prevalence of financial hardship because of medical bills among families of children with congenital heart disease (CHD) in the US and the correlation of financial hardship with adverse outcomes. This investigation utilized data on children 17 years and younger with self-reported CHD from the National Health Interview Survey of US households between 2011 and 2017. Financial hardship due to medical bills were divided into three categories: no financial hardship, financial hardship but able to pay medical bills, and unable to pay medical bills. Of 188 families of children with CHD (weighted sample of 151 537 families), 48.9% reported some financial hardship due to medical bills, with 17.0% being unable to pay their medical bills at all. Financial hardship due to medical bills was common among families with children with CHD in this study, and it was associated with high rates of food insecurity and delays in care due to cost, suggesting possible avenues for intervention.