S.D. Codified Laws § 58-12-25
If the Department of Social Services notifies an insurer that the department has paid for services on behalf of an individual who is covered under an individual, group, or blanket health insurance policy or contract that the insurer issued, delivered, entered into, or renewed in the state, to the extent that the insurer is legally liable, it shall reimburse the department for the cost of the services, regardless of any provision in the health insurance policy or contract that requires payment to the policy holder, subscriber, or another payee. If the insurer, after notice from the department, issues payment to any payee other than the department, the insurer remains liable to the department for the amount of benefits paid to the other party.
SDCL 58-12-25