I'm currently in Tennessee, rosehealth. Many of the meds are the same for UC and Crohn's, but there are some Crohn's meds that aren't used for UC. Humera is used, but off-label because it's not FDA approved for UC.
There's a terrific Crohn's board here at HealingWell, your son might benefit from reading there.
https://www.healingwell.com/community/default.aspx?f=17