I had one a little more than two years ago. There was one polyp found, and it was benign. Within two years I got a postcard from my colonoscopy doctor saying that I needed to call and set up an appointment to been seen. I would need another colonoscopy. At the same time there were news stories that people with the same insurance as me were being retested with colonoscopy every seven or so years, mostly because they had insurance that would cover it, not because it was needed. How often do I need a colonoscopy if there are polyps?