Sorry, I had "Tennessee" written out and I don't know what happened.
Yes, I've been served a summons. It's in General Sessions Court, which is kind of like Tennessee's version of small claims court. The maximum amount is $25,000. This suit is for $817. It instructed me to appear and answer, but someone who worked in the courthouse recommended filing a written answer, so I did.
There's no complaint attached, it just says "debt." This is apparently sufficient for General Sessions.
As far as the medical records go, I may be able to get them if I keep pushing, but everyone I talked to acts like I have to go through this sketchy law firm that owns the debt.
One important thing to keep in mind: the JDB's primary claim is that they DON'T own the debt. So the usual defense may work here. That's partly why I'm confused.

