Both the major children's hospitals in my state are ranked higher than Mayo and without a doubt, they cannot even remotely match the quality and expertise available at Mayo. Here there is a more limited range of procedures and tests available, they see fewer cases per year, heck, they have a grand total of 3 doctors and none of them even specialize in the types of illnesses that are being tossed around for Ds. I can tell you that our local GI team, the one that US News ranked higher than Mayo, told us point blank that they were out of ideas, knew something was wrong, and that we needed to pursue a second opinion. They were thrilled we went to Mayo. Now, it may not turn out to be the best place for you, and Cincinnati is on my list as the next "go-to" if we hit a dead end at Mayo. Perhaps Dallas is an excellent choice, but I would not put much stock in those rankings. If nothing else, they do not reflect expertise in the area of Crohn's or diagnostics, just a general evaluation of all GI.