You might have to repeat a portion of you internship year if you do a TY internship but then decide to do gen surg, IM, etc.
Some other things to think about...
Lets say that you do a military internship, and the navy decides to call what you did a Family practice internship because it was at one of the FP residency programs the Navy has.
Now, your locked onto only 2 more years of HCFA funding for training at a full 1.0 rate, and if a program takes you into their CA-1 spot, then they will get 2 years of 1.0 and the remaining year will be reimbursed at a 0.5 rate.
now HCFA funding may not be the bulk of a training programs funding, but in some programs, it may make you less competitive.
now, lets say you did a Transitional year, and then go do anesthesia you will have all three years at the 1.0 rate.
So, yes, what internship you do matters.
Now, as far as repeating it, I know some people do, but I don't plan on repeating internship.
One could even make the argument that after 3-4 years as a GMO, you should repeat it just to relearn hospital medicine, but I don't hate myself enough to go through internship again.
i want out