If Medicaid begins making payments pursuant to Title 22, Chapter 6, Article 9, on or before September 30, 2019, Medicaid shall pay hospitals as a base amount for state fiscal year 2019, for inpatient services an APR-DRG payment that is equal to the total modeled UPL submitted and approved by CMS during fiscal year 2019. If Medicaid begins making payments pursuant to Title 22, Chapter 6, Article 9, on a date other than the first day of fiscal year 2019, there shall be no retroactive adjustment to payments already made to hospitals in accordance with the approved State Plan. If approved by CMS, Medicaid shall publish the APR-DRG rates for each hospital prior to September 30, 2018. If Medicaid does not begin making payments pursuant to Title 22, Chapter 6, Article 9, on or before September 30, 2019, Medicaid shall pay hospitals as a base amount for fiscal year 2019 the total inpatient payments made by Medicaid during state fiscal year 2007, divided by the total patient days paid in state fiscal year 2007, multiplied by patient days paid during fiscal year 2019. This payment to be paid using Medicaid's published check write table is in addition to any hospital access payments Medicaid may elect to pay hospitals inpatient payments other than per diems and access payments, if Medicaid does not make payments pursuant to Title 22, Chapter 6, Article 9 in fiscal year 2019, only if the Hospital Services and Reimbursement Panel approves the change in Hospital Payments.