Ohio Rev. Code § 5124.37
The department of developmental disabilities shall make its best efforts each year to determine ICFs/IID's medicaid payment rates under this chapter in time to pay the rates by August fifteenth of each fiscal year. If the department is unable to calculate the rates so that they can be paid by that date, the department shall pay each provider the rate calculated for the provider's ICFs/IID under those sections at the end of the previous fiscal year. If the department also is unable to calculate the rates to make the payments due by the fifteenth day of September and the fifteenth day of October, the department shall pay the previous fiscal year's rate to make those payments. The department may increase by five per cent the previous fiscal year's rate paid for any ICF/IID pursuant to this section at the request of the provider. The department shall use rates calculated for the current fiscal year to make the payments due by the fifteenth day of November.
If an ICF/IID's medicaid payment rate paid under this section is lower than the rate calculated for it for the current fiscal year, the department shall pay the provider the difference between the two rates for the number of days for which the provider is paid the lower rate. If an ICF/IID's medicaid payment rate paid under this section is higher than the rate calculated for it for the current fiscal year, the provider shall refund to the department the difference between the two rates for the number of days for which the provider is paid the higher rate.
R.C. § 5124.37