List prices, like chargemaster. Yes, on one hand, insurance negotiates %x0 discount on it (but eg in the above case, my insurer, Anthem was -ostensibly- charged full price on it) . OTOH, see example above, whereby simple intervention of designating what specific service I will be taking upfront makes a 10x difference in prices. So, regardless of insurance, this transparency gives a serious lever for informed decision-making (whenever that's possible), and can be used additionally to price negotiation.