S.D. Codified Laws § 27A-13-3.1
The secretary of social services shall direct the Human Services Center to calculate and maintain for each patient at the center a billing statement itemizing the individual charges for the care, support, maintenance, and treatment provided to each patient. The center shall determine the patient or legally responsible person or agency's ability to pay such charges considering such factors as the person's financial ability to pay and the availability of commercial insurance or other third-party payors. If the center determines that the patient or legally responsible person or agency is able to pay the total service charge, the charge shall be assessed and collected by the Human Services Center. If the center determines that the patient or legally responsible person lacks the ability to pay the total service charge based upon the before-mentioned considerations, the patient's account shall be assessed to the state.
SDCL 27A-13-3.1