Trump signed an EO to force hospitals to be transparent about the prices they negotiate with insurers. Today, the courts upheld the policy. I don't know if the regulation will have a dramatic effect, but the more transparency in health care, the better.
https://www.nytimes.com/2020/06/23/upshot/hospitals-lost-price-transparency-lawsuit.html
https://www.nytimes.com/2020/06/23/upshot/hospitals-lost-price-transparency-lawsuit.html