Daughter has Crohn's colitis - her first calprotectin was >2000, yep, 2000! The peds guys love the non-invasiveness of this test. She was 70 a month and a half ago. Whew. Doing well on Humira and MTX.
It is a newer test. Didn't exist for me as a marker.
My GI hasn't agreed to send one on me, with my pouch, though I've asked.