Two new studies and a proposed class-action lawsuit settlement all have the potential to change dollar signs as lawmakers address the impending fiscal cliff. hide caption

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A medical assistant checks a patient's blood pressure at a community health center in Aurora, Colo. Metro Community Provider Network has received some 6,000 more Medicaid eligible patients since the health overhaul law was passed in 2010. John Moore/Getty Images hide caption

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A Unity Health Care patient gets his ears checked. Unity Health Care hide caption

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With help from the Affordable Care Act, government fraud investigators will make more use of computer programs to detect Medicare and Medicaid scams. hide caption

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A budget crunch in Oregon led to an unintended experiment that helped researchers assess Medicaid's effect on adults' health. hide caption

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When the U.S. Supreme Court made a Medicaid expansion optional under the Affordable Care Act, the decision lowered the estimated cost of the law. Chip Somodevilla/Getty Images hide caption

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Marcia Esters hopes charity will pay for dental work that Medicaid used to cover. Erika Beras hide caption

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Virginia Gov. Bob McDonnell says Medicaid should be overhauled before it's expanded. Cliff Owen/AP hide caption

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Texas Gov. Rick Perry is the latest state executive to say no to an expansion of Medicaid. Win McNamee/Getty Images hide caption

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Protesters and supporters of President Obama's health care law await the Supreme Court's ruling Thursday. The court ruled to uphold the law. The focus now shifts to the states, which are responsible for the lion's share of getting people without insurance covered. Kevin Dietsch/UPI /Landov hide caption

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When the U.S. Supreme Court rules Thursday on the constitutionality of the Affordable Care Act, it will also rule on whether the expansion of Medicaid is an unconstitutional infringement of states' rights. Adam Cole/NPR hide caption

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