[The entry of foreign capital into the health system in Brazil].

The study describes the history of legislation, analyzes the trajectory and the amount of foreign capital in the Brazilian health system. The Organic Health Law restricted the participation of foreign capital; sectoral legislation, however, allowed its subsequent entry into supplementary medical care and, in 2015, a new law promoted unrestricted openness, including in hospitals and healthcare services. Our study analyzes documents, legislation, and data obtained from secondary public bases or via the Law on Access to Information. Direct investments and merger and acquisition acts in the private health sector were considered. Five phases were identified: inaugural planning, regulated expansion, legal restriction, sectorized release, and expanded opening. From 2016 to 2020, the amount of foreign resources entering the country's healthcare services was almost ten times more than the previous five-year period. Thirteen companies or funds were identified, most of them from the United States. Regulation allowing for the opening of foreign capital were preceded by business lobbies and public-private interactions that can affect the quality of public policies and the integrity of the legislative process. The invested capital seeks established and profitable companies in various segments of activity. Admission occurs in non-universal private care networks, which serve specific, geographically concentrated clientele. We conclude that foreign capital, an element of health financialization process, is expressed as a possible vector of the expansion of inequalities in the population's access to health services and as an additional obstacle to the consolidation of the Brazilian Unified National Health System.