Going to disagree some with AZ . . . there are really only three reasons for regularly repeating the invasive tests for Crohns (colonoscopy, EGD and pill cam) . . . to diagnose in the beginning, to watch for serious complications like strictures and fistulas and to screen for the sllightly increased risk of cancer after you have had the disease for many years. Otherwise most GIs will monitor your symptoms to track the course of your illness, adjusting meds as they go along. For people who are not in the cancer screen years (usually after active disease involving the colon for 15-18 years) scopes and pill cams every 5 years or so are generally adequate, unless you are showing very pronounced symptoms or signs of a major complication, like obstruction or serious bleeding. A SBFT barium swallow series can also tell a lot about
the small bowel without the expense and hassle of the pill cam. Most GIs will opt for periodic, but not frequent, scopes and pill cams for disease that is othwerise fairly well controlled. Simply put, once they have looked in their and said "yep it's Crohns" there is no compelling reason to look again that often unless there is a red flag showing.