"Single Payer" means the government decides who gets what. That is what they have had in GB since the 1950's. That means that it is RATIONED. Only very wealthy people, those that fly to other countries, like the U.S.A. get prompt service.
https://www.nytimes.com/2018/01/03/world/europe/uk-national-health-service.html
This article is a small window to understanding how bad "single payer" has become.
When I was a small child we paid directly for medical services like you now pay for dental services or services.
Single payer is fraught with fraud and bureaucratic abuse and neglect. Un-elected officials make all of the decisions and you can't get rid of them.
@Gardening with Rabbits, start calling attorneys. Many attorneys who don't handle this kind of case will direct to those that do. I can't really ask for specific advice from the attys that I work with bc you live in another state. Give your search a couple of weeks. If you hit a brick wall, PM me and I'll see what I can find out for you. Prayers sent for your comfort.

Also,
F.alse
E.vidence
A.ppearing
R.eal