Mines is 1800 and doctor has told me that's as high as lab can test too , been on steroids ten months in the last year and a half every day is getting worse , IBD team contacted me today I'm waiting on emergency colonoscopy appointment...  I'm dreading it being cancer 

Try not to worry. I was told that a very high reading doesn't usually mean cancer. A calprotectin level of 200/300 can sometimes point towards cancer, but not usually 1800.  I was told that above 600 is usually either a false positive or an IBD like Chrones or Collitis. And an IBD is very treatable, so try not to worry. I worried myself sick and for me it turned out I only had diverticuler.

Try not to worry. I was told that a very high reading doesn't usually mean cancer. A calprotectin level of 200/300 can sometimes point towards cancer, but not usually 1800.  I was told that above 600 is usually either a false positive or an IBD like Chrones or Collitis. And an IBD is very treatable, so try not to worry. I worried myself sick and for me it turned out I only had diverticuler.