Medicare provider utilization and payment data (which is a large percentage of the total market in the United States) has been publicly available[1] for several years now. The Wall Street Journal won a Pulitzer Prize[2] for the analysis they did of the public data sets.

[1]: http://graphics.wsj.com/medicare-billing/

[2]: https://www.wsj.com/articles/wsj-new-york-times-win-pulitzer...

That's medicare only, unfortunately. I have that dataset.

Second this, have been trying to get my hands on this data for a while... NOT EASY :D

You are asking for the hospital master charge sheet. Impossible to get. I tried to get around this, and partially succeeded. Happy to share more details if needed.

California made all charge masters public: https://www.oshpd.ca.gov/chargemaster/