Can anyone help me? Which series and episode is it where they are all fighting over the realtime patient feedback machine?

Try to find it on episode list!!! Don't say that i didn't help you cause i did!!! I know that there's 8 seasons of Scrubs, but if you really wanna know this, you're gonna check the episode list of Scrubs!!!

Are you talking about the "Rate Your Doc.com" website?

If so, that is "My Number 1 Doctor" s07e06.