I do not understand those prices.
That sort of multi-tier pricing is typical of the US medical system. Its like college or car pricing in the US - figure out a way to charge each customer the absolute most that individual will cough up. Insured .... ooop, you have an effective negotiator. Uninsured - you'll be dead if you don't pay whatever we want. White middle class kid with Eduo-American surname? Full price for college. Black kid with Spanish surname and questionable immigration stats - no problem, we'll charge the white suburban kids a bit more so we can give you a scholarship.