S.C. Code § 38-71-360
An individual hospital, medical, or surgical expense incurred insurance policy, hospital service plan contract, or medical service plan contract, other than a limited classification policy, delivered or issued for delivery in this State which provides that coverage of a nonhandicapped dependent child terminates upon attainment of the limiting age for the child as specified in the policy or contract shall also contain a provision to the effect that upon the attainment of the limiting age the child is entitled to have issued to him, without evidence of insurability, upon application made to the insurer within thirty days following the attainment of the age, and upon payment of the appropriate premium, an individual policy of accident and health insurance. The policy shall provide the coverage then being issued by the insurer which is closest to, but not greater than, the terminated coverage. Any probationary or waiting period set forth in the policy must be considered as met to the extent coverage was in force under the prior policy. For purposes of this section, "limited classification policy" means an accident-only policy, a limited accident policy, a travel accident policy, or a specified disease policy.
S.C. Code § 38-71-360