"The Affordable Care Act (ACA, P.L. 111-148, as amended), enacted in 2010, appropriated billions of dollars of mandatory funds to support two programs that focus on expanding access to primary care services for populations that are typically underserved: the Health Centers program and the National Health Service Corps (NHSC). [...] The ACA established the Community Health Center Fund (CHCF) to help support the Health Centers and NHSC programs, and gave it a total of $11 billion in annual appropriations over the five-year period of FY2011-FY2015. Appropriations for the CHCF were subsequently extended for two years (i.e., for FY2016 and FY2017) by the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA; P.L. 114-10). MACRA provided a total of $7.2 billion for health centers and $580 million for the NHSC over that two-year period."
CRS Insight, IN10804
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html