“I want to go to the best orthopedist.” I hear this request, or a version of it, all the time. “I want my daughter to see the best cardiologist,” or breast surgeon, or neurologist. I try to explain to patients that there’s no way to figure out who is the single best doctor in a field, or even what it would mean to be the best. Would it mean the best outcomes? The best patient satisfaction? The best reputation among colleagues? I try to explain that there is a group in every sp...