When you submit your application you're randomly assigned a UCI number which is this format 'CAN0000000000'. However, a change in the UCI number to 8-10 digits means that your file is being looked into and normally means that the 'Medical Test Passed' status is on its way.Could someone please explain again or point me to the post explaining the change in UCI number? They are currently "reviewing the results" of my medical exam. My UCI number is now different than it originally was. Not sure when exactly it changed, just noticed today.