B.F.
I would contact more then one attorney to interview and also many attorney's are word of mouth practice. It will take a good amt of work on your part to call set up interviews and go to them. I would not let this go and most law suites are worth going forward with.
I would seek someone that does mainly malpractice just like a dentist you don't go to him when your foot hurts, then don't go to an attorney that does say mostly divorce.
You may need to get an attorney that has passed the bar being able to practice in both GA and Tn. I know many that have taken the bar in one then one state and can practice in more then one state since doing so.
Go forward with this don't let the doctor just walk away. You may also have to file a complain with the license board in TN since that's where that doctor has a practice.