I think part of it is that there is a huge difference in cost between some facilities. But another part of it is that a lot of hospitals don't really know what

I think part of it is that there is a huge difference in cost between some facilities. But another part of it is that a lot of hospitals don't really know what they charge. They had to scramble and hire consultants to come up with these numbers to meet the deadline and the numbers will probably get more accurate and vary less over time as hospitals get better used to working with prices out in the public.