I'm the author of the article.
The inflated price you're talking about is called the "gross price." It's a made-up price, or MSRP. Just publishing this price list isn't that helpful.
The price lists are supposed to contain the negotiated rates with different insurance companies or medicare. Those reflect the rates that your insurance company pays. You pay some fraction of that depending on your plan.
Most price lists don't contain this information, though.
The purpose of the article was to see how many of them contain the elements that are required from the transparency bill, the ones which allow meaningful price comparison between hospitals. And the answer is... not that many do.
But among the ones that do, you can kinda sorta make a meaningful comparison (but there are even caveats there as well.) Feel free to follow up if you have more questions.