Yes, it is possible to have a stone when the KUB is negative. There are certain types of stones that are not seen with a KUB. The best test would be a non-contrast CT scan. This should be considered if a kidney stone is still suspected.
Followup with your personal physician is
essentialEssential balance
Essential hypertension
Essential tremor.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b