MSM 

Agreed

Every single source I have and Puellanivis has referred to has said that TG/TS women are considered MSM or "along side" MSM. The much vaunted CDC source made it sound even less ambigous. Her very own source backed me! That TG/TS women are for the CDC's and any other medical purpose biologically male, that the MSM category does not take into account any aspec of identity. Which would include gender identity. Case closed.

The rest of this has just been about Puella and her personal feelings.   

No, my source states that gender identity is not tracked at all, so the assumption on their part is that everyone is reported as they "biological" sex.  However, again, if a TS/TG were reported as female, since no gender identity information would be collected there would be no indication of which were which.  Literally TS/TG information is entirely intermingled, in some indeterminable amount.  The ambiguity of not collecting TS/TG information means that there is simply a blanket assumption about how the information is received from the CDC... the true answer is, because of the ambiguity no one knows how they're split up... the data is intermingled, and there is no way to separate the information.  Again, the answer from the CDC and from your sources is that the assumption is that MTF TS/TG are reported as MSM, and FTM are just pretty much ignored... N.B. assumption... since gender identity information isn't collected no one can say what it is.  Again, being that my medical records indicate me as female, and I continue to be asked "are you pregnant?" when getting x-rays indicates that I would not be reported as a male to the CDC.  Without collecting gender identity information, no one can with certainty that all TS/TG are recorded as MSM.  The answer is "it's inconsistent and no one knows", not "haha I'm right, you're wrong, TS/TG are always MSM".