Dr. Who?

Why can't one doctor treat one patient? Why is it one doctor who treats a patient's hand and another who treats his foot and another who treats his gut and another who treats his lungs and another who treats his heart and another who treats his ear, and on and on ad infinitum???

Where is just one doctor who sees a patient with two conditions and treats them both? Where is just one doctor whose ears are trained to listen to all of the complaints? Where is one doctor who cannot see the pain for the possibly interesting condition?

If he has to go to 100 doctors, we'll find one who listens.