States with Section 1115 ACA Expansion Waivers, December 2015 December 21, 2015 Slide This slide shows the current status of state decisions to use Section 1115 waivers to expand Medicaid. A total of 31 states including DC have adopted the ACA Medicaid expansion, including 6 states with ACA 1115 ACA expansion waivers. AZ has a pending waiver application that seeks changes to its expansion. MT and NH’s waivers will take effect on 1/1/16. PA originally expanded through a waiver but subsequently transitioned to a state plan amendment. TN and UT have debated waiver proposals which have not been approved by their state legislatures or submitted to CMS.