Well, the PA won't give you an injection if he doesn't think it's appropriate. And who says you'll need to go make an appointment for an x-ray and then make an appointment to go back? My doc doesn't have x-ray equipment, but when he wants me to get an x-ray, I just walk to a different office in his building immediately and get the x-ray.
Make your appointment if you don't want to see the PA. I don't see rigamarole, I see excuses. If they specialize in joints, the PA will know about joints. When I needed the cortisone shot in my knee, the PA did it. And that was pretty awful.
Forgive my rudeness; I cannot abide useless people. - Murphy
Angry people want you to see how powerful they are. Loving people want you to see how powerful you are. – Chief Red Eagle
All we have to decide is what to do with the time that is given to us. - Gandalf