Concerning Medicaid expenditures. Declares the Health Care Authority (Authority) to be responsible for oversight of program integrity activities for all Medicaid funding received by state agencies. Directs the Authority to use specific best practices for identifying improper Medicaid spending and establishes standards for contracts between the Authority and managed care organizations regarding responsibilities for maintaining program integrity. Requires the Authority to develop a strategic plan for Medicaid program integrity and a single, statewide Medicaid fraud and abuse prevention plan. Establishes the Medicaid Expenditure Forecast Work Group in statute to provide technical support to the Governor’s Office and the fiscal committees of the Legislature and approve a Medicaid expenditure forecast for use in the budget development process.