[timtadh]

Small single practices office are going away. Doctors are corporatizing either by merging with other practices or being bought out by hospitals or hospital groups. The reason: electronic medical records and new regulatory requirements. The burden of these regulations has been making it increasingly costly to run single doctor practices. So the result is less choice (in business) and less control for the doctor over the patient experience.

In conclusion, it is a nice idea to think of the doctors as "business people" but the reality is there are fewer and fewer who are. Most are now employees in a large corporate system.

(also +1 to the sibling comments)