As used in this chapter, unless the context indicates otherwise:
(1) "Department" means the department of social and health services.
(2) "Secretary" means the secretary of the department of social and health services.
(3) "Deputy secretary" means the deputy secretary of the department of social and health services.
(4) "Overpayment" means any department payment or department benefit to a recipient or to a vendor in excess of that to which the recipient or vendor is entitled by law, rule, or contract, including amounts in dispute pending resolution.
(5) "Vendor" means an entity that provides goods or services to or for clientele of the department and that controls operational decisions.