This is the first in a series of policy posts on upcoming changes in Medi-Cal and the fiscal and policy uncertainty the changes create. In this post, we briefly highlight four upcoming major changes: (1) the renewal of the state’s Section 1115 waiver, (2) proposed modifications to the federal government’s regulations for Medicaid managed care plans, (3) the phase-in of state’s share of cost for the Affordable Care Act’s optional expansion population, and (4) the need to restructure the managed care organization tax to meet federal requirements. In the coming weeks and months, we will provide more detail and updates on these changes and their potential implications for the Medi-Cal program and the state’s budget in future policy posts similar to this one and in budget analyses.