Tennessee law requires that formal notice of medical malpractice (now called health care liability) claims must be given before a lawsuit can be filed.
Notice must be given before the one-year statute of limitations (the typical deadline for filing suit in medical malpractice cases) expires. The notice must include certain information and must be given or send in a way required by statute to each health care provider who is going to be sued. Failure to give the right information or to send or deliver the notice in the way required by law will result in a dismissal of any later lawsuit against that health care provider.
(To be 100% accurate, the failure to give notice will result in dismissal of any later case against the health care provider. The Tennessee Supreme Court has not yet decided the impact of the failure to give notice precisely as called for in the statute. However, you should assume that notice must strictly follow the dictates of the statute until the Tennessee Supreme Court decides this issue.)