It depends on how you think about healing. A hospital could hold X # of patients (let's round it to 10).
One medic, or ten, could handle all these patients. However, the more medics, the more special care they could get. Bandages changed more often, what not. But the basic 'rest, sanitation, and proper diet' will do a lot for them as well. Of course, I really wanna start seeing wounds like ripping off a model's arm, but hey, that can wait for AI 2... XD