Called WN, had them drop the number and re-add (as others have said to do), but it still didn't work. Same deal for second existing reservation. Many here have said that you should get it if you add the number after the fact, but it didn't work for me. Tried every work around and spent time talking to the WN folks on the phone... to no avail. Only starting getting precheck for reservations booked after adding the KTN to my WN profile.
1 You may drink water, as much water as you can would be helpful, until arrival. 2  Routine medications may be taken, unless you have been instructed otherwise. If you are diabetic, you may take your diabetes medication no less than 4 hours prior to the exam.  Arrive 15-30 minutes before your PET scan.
Preparing for your CT Angiogram. Please bring your referral (letter from your doctor) and your Medicare and/or Pension Health care card with you to your appointment. It is important to bring all previous films relating to the region being imaged. You will be asked to fast for 4 hours before the test. If you are diabetic and take Metformin (also known as Glucophage, Diabex or Diaformin), then you may be required to stop taking the Metformin on the day of your CT scan and the following 24 hours. It is best to bring recent blood test (renal function) results with you.