1. Boxes in eRx: I am pretty sure they are remembered from one prescription to the next for me. So of the five, I have "Include DEA on script" checked. It is remembered so I never have to re-check it (except perhaps every few months it somehow is unchecked).
2. The only value that I can see for the "medical decision making" box is to then use the "E and M helper" to help you determine what level of CPT to use for your office visit. I don't use the helper so I do not choose a level of complexity.