8-10 YEARS?! Oh my gosh - that SHOCKS me. My GI does a colonoscopy on me every 3 years, unless something comes up and I need one sooner.
I had my 1st one in 2004 which diagnosed me with Crohn's. I had multiple ulcerations throughout the colon.
In 2007 I had my 2nd colonoscopy. Not much had changed in 3 years - nothing was better but nothing was worse, either.
Now in 2010, I just this week had my 3rd colonoscopy. Although I feel fine, the results showed an overall progression of the disease since the 2007 colonoscopy and my GI now wants me to change medication as it would seem the Colazal is no longer working.
My particular insurance pays for my colonoscopies because I have Crohn's Disease. I find it strange that a GI would just blanketedly said "insurance would never pay for it". Not true - not in my case anyway.
I might also add I've never heard that 8-10 years is "STANDARD" after a Crohn's diagnosis. That just seems like a REALLY long time to wait because of the nature of this disease. It's always there, working its awful magic, whether you can feel it or not.
I think you're totally right in wanting a colonoscopy every 3-4 years.