I don't do many PAs either, well I guess I do. Don't you recall when you first started using v4 or v5, can't remember, you had to codify the meds? If you didn't you could not ePrescribe them. A medication must be codified (bold and dark black) in order to by eRxd. Sure, you can send them by the eRx method, but they will only be faxed and there is less chance it will get to the pharmacy.
I was just comparing that to the insurance. You had to codify the meds so they matched the database. You now have to codify the insurance companies (once) so they match the database. I didn't come up with the idea. And, AC didn't either. Just another government thing. But, in the end, it will pay off as you will have less errors and less claims to redo.