I think that's a pretty cool homebrew class you've developed! I like the additional class features you added (I had to look up Acupuncture Specialist on d20pfsrd-- and that's a great feat to have as a bonus feat, though not something I would otherwise probably take for a PC).
I noticed 2 things that might require attention. Imp. Treat Deadly Wounds (TDW) says 'the hit points healed increases to 2d4,' but doesn't TDW typically heal a set number based on char level and type of care? Did you mean for the d4's to be added to it?
The second thing I noticed is that you put that a medic can't SA a creature with concealment. I'm not sure if this was intentional or not (unchained rogues only are stopped by total concealment). I almost want to say give the Medic debilitating injuries, like the uRogue, but that might be stealing their thunder.
I did think that because Emergency Treatment has a pretty big pool, perhaps you might add a couple choices of how it can be spent. An adrenaline shot that hastes for a round, or an an anesthetic that hinders an opponent.
Just some random ideas there at the end!