The RAND Corporation has released a brief examining the impact of the national health care reform law on state health costs and coverage rates in Illinois.  Using a simulation model, RAND projects state health costs and uninsurance rates for 2011-2020, comparing them to projections based on the absence of the national health care reform law.  The authors found that the law will significantly improve coverage while increasing state costs.

From the report: 

The Patient Protection and Affordable Care Act (ACA) contains substantial new requirements aimed at increasing rates of health insurance coverage. Because many of these provisions impose additional costs on the states, officials need reliable estimates of the likely impact of the ACA in their state. To demonstrate the usefulness of modeling for state-level decisionmaking, RAND undertook a preliminary analysis of the impact of the ACA on five states — California, Connecticut, Illinois, Montana, and Texas — using the RAND COMPARE microsimulation model. For Illinois, the model predicts that, in 2016 (the year that all of the provisions in the ACA related to coverage expansion will be fully implemented), the uninsured rate in Illinois will fall to 3 percent; without the law, it would remain near 15 percent. The model projects that total state government spending on health care will be 10 percent higher for the combined 2011–2020 period because of the ACA.

Full report: The Impact of the Coverage-Related Provisions of the Patient Protection and Affordable Care Act on Insurance Coverage and State Health Care Expenditures in Illinois: An Analysis from RAND COMPARE

RAND Corporation.  (2011).  The impact lof the coverage-related provisions of the patient protection and affordable care act on insurance coverage and state health care expenditures in Illinois: an analysis from RAND COMPARE.