"There is a group of children with severe congenital heart disease who need to arrive at hospital in good time to get treatment, and if they do so then their survival rate is very good, " he said.

BBC: Leeds General Infirmary child ops ruling 'risks lives'

Children's Hospital at Vanderbilt University, has seen teenage patients with chronic health conditions such as diabetes, congenital heart disease and cystic fibrosis age out of their family's insurance.

CNN: CDC: 'Young invincibles' have significant health concerns