Comment by PragmaticPulp

Some good news: As of 2022, we have a new "No Surprise Billing" law that covers many of these surprise billing scenarios. There is a specific provision for being charged significantly ($400) more than a "good faith estimate"

More detail about the No Surprise Billing law here: https://www.cms.gov/newsroom/fact-sheets/no-surprises-unders...

Sadly this case occurred prior to the law going into effect.