As only the government can:
Big government likes big providers. That’s why ObamaCare is gradually making the local doctor-owned medical practice a relic. In the not too distant future, most physicians will be hourly wage earners, likely employed by a hospital chain.
Why? Because when doctors practice in small offices, it is hard for Washington to regulate what they do. There are too many of them, and the government is too remote. It is far easier for federal agencies to regulate physicians if they work for big hospitals. So ObamaCare shifts money to favor the delivery of outpatient care through hospital-owned networks.
The irony is that in the name of lowering costs, ObamaCare will almost certainly make the practice of medicine more expensive. It turns out that when doctors become salaried hospital employees, their overall productivity falls.