Mo. Rev. Stat. § 208.165
The department or its designated division shall have authority after forty-five days written notice to the affected provider to withhold from any payments that may be or become due to a provider of service under the medical assistance program such amounts as the department or its designated division may determine are due to the state as a result of overpayments, cost settlements, disallowances, duplicate payments, fraud or abuse; provided that should a judicial tribunal, including the administrative hearing commission, finally determine that all or part of such withholding is due to the provider of services, the judicial tribunal may, in its discretion, allow a reasonable rate of interest on such amount from the time of the withholding.
§ 208.165, RSMo