Since I was flying to MIA, I thought paying a visit to the Miami Centurion lounge would be a nice quick stop.
One quick internet search and my hopes of visiting the lounge came to an end. It turns out that you can not access terminal D without going through security again! No thanks!
On my way back the issue is exactly the same: I would have to go through security at terminal D and then go through security at terminal H! Thus the moral of the story is unless you are traveling via terminal D or E the Miami Centurion lounge is off limits.