A fascinating and infuriating facet of medical billing in the US are the absolutely arcane statements. It is practically impossible to make any sense of them; you have no idea what it is you're paying for, or why.
My insurer (also my medical 'provider' 🤢 ) once sent me a bill labelled 'adjustment' for about $600. No explanation, no itemisation, just a demand for more money.
It's complete bollocks.
@sullybiker Had a 'dispute' with an insurer years ago and the resolution process was incredibly convoluted. I swore it was designed that way on purpose so people just give up and pay