Comment by giantg2

The thing that doesn't get mentioned much in these conversations that I've personally seen play a big role is the regulation. When you have highly complex regulations, you end up consolidating practices. As regulations increase, the number of distinct providers/owners decrease. Many individuals don't want to run their own practice due to the complexities (insurance, etc) that exist beyond the work (treating people). It doesn't make a lot of sense to deal with the insurance, billing, recordkeepeing, etc for a single physician or two. They wouldn't be able to compete with the larger and more effiecent practices that have more bargaining power with insurance companies anyways.