During the period of 1990-2000, Rio de Janeiro was characterized by a limited supply of public and universal primary care services. In 2008, family health team coverage corresponded to 3.5% of the population, the lowest among capital cities. At the end of 2013, coverage reached more than 40% of Rio residents with teams comprised of doctors, nurses, practical nurses, community health agents, and health surveillance agents, in addition to oral health teams. This article describes and analyzes the main components of the Reform in Primary Health Care (RCAPS) implemented since 2009, focusing on three lines of action: administrative reform, organizational model, and model of care. A new organizational chart of the Municipal Health Secretary and a legal framework for a new results-based model were created. As for the model of care, the standardization of procedures and health activities for all units and the monthly assessment of clinical indicators of results of implanted electronic medical records were created. Experience has shown the feasibility of RCAPS, pointing to new challenges that will allow consolidation of the expansion of access, training of human resources, health communication, and a shift to a managerial results-driven model.