On or after January 1, 1989, "employee" means any officer, employee, agent, or court appointed representative of the State or its political subdivisions, including elected or appointed officials, law enforcement officers, and persons acting on behalf or in service of a governmental entity in the scope of official duty including, but not limited to, technical experts whether with or without compensation, but the term does not include an independent contractor doing business with the State or a political subdivision of the State. Custody of prisoners by the State or any of its political subdivisions does not in and of itself create an employer and employee relationship between the State and the prisoner. Provided, the provisions of this section in no way limit or modify the liability of a licensed physician or dentist, acting within the scope of his profession, with respect to any action or claim which involved services for which the physician or dentist was paid, should have been paid, or expected to be paid at the time of the rendering of the services from a source other than the salary appropriated by the governmental entity or fees received from any practice plan authorized by the employer whether or not the practice plan is incorporated and registered with the Secretary of State.
S.C. Code § 15-78-30