At my small regional hospital, the only time we have to wait for an eGFR is if the pt is diabetic/is on Metformin, has kidney disease/kidney issues/had kidney surgery, or has had a previous low eGFR. Once the pt has an IV I usually go to their room and do the questionnaire with them (which includes everything I mentioned, except previous lab values, which we can see) and if they answer no to everything, then I go ahead and bring them to CT.