I have been searching and reading posts in regards to this issue, and I still haven't seen a clear definitive answer on why NPs are not a threat to IMs. I've noticed that NPs can prescribe medicine and also do most tasks that IMs do. If this is the case, wouldn't hospitals hire NPs due to their lower salaries. Exactly what can IMs do that NPs can't. This girl I know where I volunteer is going for her NP and she claims that NP's knowledge is on par with MDs and DOs.