30 Miss. Code. R. 2635-8.4
Except as otherwise provided by law, rule or regulation of this state, any medical expert activity by a physician regarding a legal matter pending in a state or federal court or administrative agency in Mississippi must be performed by a physician who holds a current unrestricted medical license in Mississippi, another state or foreign jurisdiction, and who has the qualifications to serve as a medical expert on the issue(s) in question by virtue of knowledge, skill, experience, training, or education. This rule does not supersede the policies and rules of the Board in regards to unreferred diagnostic screening tests.
The practice of any physician not licensed in Mississippi that meets the licensure and qualification requirements stated in the above paragraph shall be deemed automatically by the Board to be authorized to include the performance of medical expert activities as an otherwise lawful practice, without any need for licensure verification or further requirement for licensure. In accordance with the provisions of law in Mississippi, any physician not licensed in Mississippi whose practice is deemed automatically by the Board to be authorized to include the performance of medical expert activities as an otherwise lawful practice shall be subject to regulation by the Board regarding the physician's performance of such medical expert activities in the state of Mississippi.
30 Miss. Code. R. 2635-8.4