From The New York Times here.
[A]n increasing share of young physicians, burdened by medical school debts and seeking regular hours, are deciding against opening private practices. Instead, they are accepting salaries at hospitals and health systems. And a growing number of older doctors — facing rising costs and fearing they will not be able to recruit junior partners — are selling their practices and moving into salaried jobs, too. . . .
And for all the vaunted efficiencies of health care organizations, there are signs that the trend toward them is actually a big factor in the rising cost of private health insurance. In much of the country, health systems are known by another name: monopolies. . . .