The department may inspect the facilities and review the procedures utilized by any chemical substitutes or antagonists program, residential program, or nonresidential outpatient program that has as a primary purpose the treatment and rehabilitation of persons with a substance use disorder, for the purpose of ensuring compliance with this chapter and the rules adopted pursuant to this chapter . The examination and review may include case record audits and interviews with staff and patients, consistent with the confidentiality safeguards of state and federal law. [C75, 77, §224B.16; C79, 81, §125.15 ] 86 Acts, ch 1245, §1130 ; 2000 Acts, ch 1140, §20 ; 2011 Acts, ch 121, §34, 62 ; 2023 Acts, ch 19, §89