[prirun]

This is called "balance billing" and the No Surprises Act usually prevents it, especially in emergency cases.

https://www.healthinsurance.org/glossary/no-surprises-act/

[why-o-why]

This happened in 2013, 9 years before the Act. Hopefully the Act prevents this kind of stuff. The medicare limit is what really confused me. If there is a limit insurance will cover up to, then how is it possible to exceed that limit?

[quietsegfault]

Not for ambulances!