Los Angeles County's health system faces millions in lost funds and closures of hospitals or clinics if large scale changes to implement the Affordable Care Act are not made in the next year, or in some cases within three months, according to a report expected to be presented to the county Board of Supervisors next week. Under President Barack Obama's Affordable Care Act, the county's health system will receive reduced federal money through the Disproportionate Share Hospital fund. The county received $415 million in DSH funding for the 2012-2013 fiscal year. Under ACA, health service departments across the country will lose a total of $500 million in 2014, and up to $4 billion by 2020, according to the report.