There are a unique set of rules applicable to Tennessee medical malpractice cases. (Note: the Tennessee Legislature has decreed that such cases must now be called "health care liability actions.)
In a health care liability action in Tennessee, both the liability of the health care provider and the link between the negligent action or omission ("causation") must be proved by one or more expert witnesses in the vast, vast majority of cases. The liability expert must 1) practice in a field of medicine that makes his or her testimony pertinent to the case; 2) practice in that field of medicine in Tennessee or a contiguous state in the year preceding the incident; and 3) be familiar with the regularly accepted level of medical practice in the community where the incident took place or a similar community.
The causation expert must also meet the geographic requirements mentioned above. However, this expert does not need to know the standard of care in the community where the incident occurred if his or his expert opinion is limited to causation issues.