To expand on your comment, only 4% of US bankruptcies are because of medical bills <https://www.washingtonpost.com/blogs/post-partisan/wp/2018/0...>. A tipoff that [insert large percentage here] of bankruptcies aren't actually because of medical costs is that only 6% of bankruptcies by those without health insurance are because of that cause. The biggest cause of bankruptcies is lack of income, which health insurance doesn't affect.