The new Food Safety Modernization Act (FSMA), issued by the Food and Drug Administration (FDA) is considered the most comprehensive reformation of the American legislation on food safety matters in 70 years. Contrary to the previous food safety regulations, FSMA is focused on hazards prevention and requires that food business operators guarantee the implementation of safe practices during every step of the supply chain; from the production to the distribution. FSMA audits will help you to ensure that your suppliers meet the new standards, in order to comply with the FDA requirements. It is essential that every company exporting food products to the United States to update to the new rules which require a higher degree of attention and a different organizational method. As a matter of fact, every registered company will undergo a specialized inspection by 2020, as communicated long ago on the official FDA website. A high number of companies have already received a notice from FDA and they must be prepared for the official inspections (FDA FSMA audit lasts up to 4 or 5 days).
Here is the Public Registry of Accredited Third-Party Certification Bodies on US FDA site.