My Doctor Wants Me To Have A Renal Ultrasound Rx:

My doctor wants me to have a renal ultrasound rx: stage 3 crd. She said it may be as simple as kidney stones. The reason for the test is due to my blood work recently done before visit. i am a 65 year old woman and she said it also affects the count as we grow older. she just wants to be sure that there is nothing more serious. could it be a simple reason for this ultrasound order.