I was always advised against taking courses at a CC. Since you aren't taking it at a comparable difficulty to what you have taken before, an A will not do very much for you. It's pretty obvious that you should be able to get an A the second time you learn the information, especially at a CC....what if you don't get that A though?
On the other hand, do some calculating. How much will your GPA go up from a single A? If it's less than 0.05, I wouldn't do it. If it will bump you up to a 3.4, then it may be a good plan.
Are you applying to DO programs? If you are, then it further makes sense to retake since they do grade replacement, but if you are primarily applying MD then you won't be better off taking the class again.