Rights of medicaid provider or subcontractor; preliminary

or final determination of overpayment. A. A medicaid provider or subcontractor may challenge: (1) the department's preliminary or final determination of overpayment as: (a) exceeding statutory authority; (b) arbitrary or capricious; (c) a failure to follow department procedure; or (d) not supported by substantial evidence; (2) the credentials of persons who participated in the audit or claims review; or (3) the methodology or accuracy of the department's audit. B. A medicaid provider or subcontractor may, but shall not be required to, conduct its own audit or sampling to challenge a preliminary or final determination of overpayment.