Probably not going to get seen in this morass of comments, but I went back and reviewed the CMS data that the article cites. The article used the Diagnosis Related Group (DRG) 238 - Major Cardiovascular Procedures without Major Complications. This is the best guess at capturing the costs of "Open Heart Surgery". (CMS only releases data for the top 100 DRG codes). "Open Heart Surgery" is a term for a variety of surgic…
Why does the clinic charge that much to Medicare, if Medicare doesn't pay that much (legally, I presume)? Is it an accounting trick or something?
For example, if the charges exceed the DRG payment by a specific amount, the hospital can get an "outlier" payment to help with the excess costs.
As for how the charges are calculated, hospitals have a lot flexibility in how costs are accounted for.
Also, keep in mind that hospitals that specialize in a specific procedure often have high volumes that drive down cost. If you're getting heart surgery at a hospital that specializes in it, it's often much cheaper than a hospital that rarely does heart surgery.