As part of my regular consulting work and research, I end up with a bunch of really good artifacts. If these are not part of a non-disclosure agreement, I make them available for public use. Some examples are the national average charge database, which contains charge data for over 10,000 procedure codes. Or the top 10 utilization study, which contains the top 10 procedures by specialty. You should check this area regularly as I update my data sets pretty frequently.