I have started doing this and I use the claim based way. Here, if you eRx on a Medicare patient during an office visit you just put in code G8553 with a $0 charge as well as the E/M code and off it goes. You do 25 of those for 2010 and your done. A little tough for me because I don't do a lot of prescriptions but I guarantee I'll do 25 before year's end!