Note that your article cites at least 1 other study that says 5-6% or even as high as 10%. It would be interesting to see a breakdown here - does this include prescription medication? It seems like if you're talking about provider regulation, you shouldn't include that.

Unfortunately the article doesn't make it easy to figure this out.

Even assuming that the 10% number is the right one, it still seems good enough in my book if, in the beginning, only 90% of the expenses get addressed successfully.

You don't need that long of a list of things that cost 2% before you've explained quite a lot.