1. Tax Relief and Health Care Act of 2006, Bill No. H.R. 61111, Public Law No. 109–432, Title I, §101.
2. Medicare, Medicaid, and State Children's Health Insurance Program Extension Act of 2007, Bill No. S.2499, Public Law No. 110–173, Title I, §131.
3. Medicare Improvements for Patients and Providers Act of 2003, Bill No. H.R. 6331, Public Law No. 110–275, Title I, §131.
4. Affordable Care Act of 2010, Bill No. H.R. 3590, Public Law No. 111–148, Title III, §3002.
5. Available at: http://www.acr.org/SecondaryMainMenuCategories/quality_safety/p4p/FeaturedCategories/P4PInitiatives/pqri/FeaturedCategories/resources/PQRS-2012-Update-Final.aspx. Accessed January 5, 2012.