S.D. Codified Laws § 28-13-26
Each board of county commissioners may annually employ a duly qualified physician and surgeon registered and licensed in the healing arts, as the term "healing arts" is defined by chapter 36-2, as county physician, whose duty it shall be to attend and render his services as physician and surgeon to poor persons of the county. The board of county commissioners shall fix the annual salary to be paid and which shall be paid monthly with warrants of the county auditor upon proper verified vouchers approved by the county commissioners. It shall be the duty of such physician and surgeon to file with the county auditor not later than the first day of each month a report disclosing the patients treated by him, the value and kind of services rendered and the name and address of the person so treated within the previous thirty days.
SDCL 28-13-26