(A) The director of developmental disabilities shall establish a process under which an ICF/IID provider, or a group or association of ICF/IID providers, may seek reconsideration of medicaid payment rates established under this chapter. Except as provided in divisions (B) to (E) of this section, the only issue that a provider, group, or association may raise in the rate reconsideration is whether the rate was calculated in accordance with this chapter and the rules adopted under section 5124.03 of the Revised Code. The provider, group, or association may submit written arguments or other materials that support its position. The provider, group, or association and department shall take actions regarding the rate reconsideration within time frames specified in rules authorized by this section. If the department determines, as a result of the rate reconsideration, that the rate established for one or more ICFs/IID is less than the rate to which the ICF/IID is entitled, the department shall increase the rate. If the department has paid the incorrect rate for a period of time, the department shall pay the provider of the ICF/IID the difference between the amount the provider was paid for that period for the ICF/IID and the amount the provider should have been paid for the ICF/IID.