A Tennessee medical malpractice claim, now called a "health care liability action," should only be filed by a lawyer experienced in health care liability litigation. I would never recommend that a non-lawyer file such a case.
There are many, many reasons for this, not the least of which are that way that one files a lawsuit against a health care provider. Health care providers have persuaded the Tennessee General Assembly to erect artificial barriers to lawsuits against them. A couple of those barriers have to do with how the lawsuit is initiated. First, almost always pre-lawsuit notice must be given to the health car provider in a very specific way. Second, when the lawsuit is filed a "certificate of good faith" must be filed. Once again, Tennessee law has very specific requirements for a certificate of good faith.
The failure to strictly comply with Tennessee law on these matters will result in dismissal of the case. Dismissal of the case will result in the imposition of financial sanctions against person who did not comply with the law by initiating the case.