No way to get a different PT?

I've had to go the PT route 3 times--2 of which got the MRI authorized. First time in 2000 where I herniated the L4/L5 disc and went through 6 months of hell before the MRI approval--results, a lumbar laminectomy. 2nd time around 2012 or so but PT did the trick this time. 3rd time, around mid 2013, I went through the PT and then got the MRI authorized. The MRI was hell--something about the position and being there for so long was just a nightmare, but I ended up with an injection which has worked ever since.