I am a student and still, after 2 months, I cant get a grip on E&M which is the last chapter in my studies. How do I know when I need to use an E&M code? There are so many instances to use them, ER, General office visit... This is by far the hardest to learn for me. If I had known it would be this hard, I wouldnt have even picked this career. Any help is greatly appreciated!