We have a patient who had procedure done 11/02/12 a colonoscopy, patient had 5 adenomatous polyps but also had a poor preparation and the physician was unable to see well. They want the patient back in one year but per guidelines of Medicare they can be eligible with in two-five years unless they develop signs or symptoms then it's based on medical necessity. So our question is, have any of you dealt with that? is there a code or do we have to get the patient to sign an ABN?