We can probably both add to this, but a donation physician.... Oftentimes, if there's someone in an intensive care unit who could become an organ donor, there's a bit of a tête-à-tête or a potential conflict such that the critical care doctor—who's trying to save that patient's life—cannot really ethically be involved in issues related to management of this individual as an organ donor. There's a line here.
The critical care person taking care of that patient needs to back away and let a new person come in. This is the donation specialist, who learns and takes care of how to actually provide medical support for someone who is now deceased by law, if they meet brain death criteria, but who needs to have clinical decisions made as to the right thing to do to support the organs that are going to be used for transplantation, that are going to be donated for transplantation. That's a different kind of specialist.
Maybe Norm wants to comment as well, but that's what we mean by “donation specialist“. It's a very important distinction in the process through which an individual becomes a deceased donor.