I stand corrected. What MettGT says is true, unless of course that NAMI physical has expired. My point is that any physical done at Quantico will be secondary to a NAMI physical once you get down to Pcola.
You're right about NAMI having the last say, but for clarification for others, you only need to see the docs at NAMI once (unless you need a waiver, but that's another story). The initial NAMI flight physical is good for 2 years, and if that physical is going to expire while you're at TBS, you get a flight physical in Quantico. When you get to Pensacola, you'll still need a flight physical, but it'll just be from the docs over at the branch clinic, not NAMI.
There are some people that didn't go to NAMI before OCS/commissioning/whatever and got just a plain jane flight physical from the nearest flight surgeon. If you're one of these people, then, yes, when you get to Pensacola, you'll have to have one done at NAMI.