No need buddy, the Diagnostic Card 
will be included with your NExT order.
How did you find that out? Printed on it?
Have you tried scanning it with TagInfo?
HID do both HF 
and LF 
systems.
It will be better for you if it is LF; meaning a Proxmark and NExT SHOULD have you in and out of your workplace with a swipe of your hand.
if it is HF it will be iCLASS, and this will be a little more difficult…
Let’s wait and see what you get after a scan of you card with TagInfo 