Present with abdominal pain, admitted, CT imaging, pain management. Imaging read, kidney stone diagnosis confirmed (and of such a size that it needed immediate management). No urology available at hospital one, and because of narcotics on-board, transferred to nearby hospital via ambulance that did have a urologist available, so I could go straight to theater.

But yes, hospital two tried to charge me for an ER visit, as well as the surgical billing (which of course was reasonable).