That isn't how any ER I've ever heard about works. ER scheduling is all about triage, the worst ailment or injury gets treated first. I've been in ERs on a couple of occasions with fairly serious problems. one a concussion and another a broken bone and saw indigent gangbangers with gunshot wounds taken ahead of me because their injuries were life-threatening. One another occasion I went in with a history of tightness in my chest hat had gone away and was taken immediately ahead of the others in the crowded ER because it could have been life-threatening.