my 83 y.o. dad was at an egfr of 40 about 15 months ago. Took him in for a CT w/Contrast last week, and it's now at 30. They couldn't use the contrast. Appears there may also be some pancreatic issues developing. I understand they can go hand in hand. But where to start? Kidneys or Pancreas? His blood sugar is creeping up too... Might be time for a nephrologist.