The Instituto Mexicano del Seguro Social (IMSS) is the main institution of social security in México and has been a pioneer in Latin America in the comprehensive organization of medical attention. This and many other achievements have been possible due to the preparation and performance of its staff, their professionalism, humanitarian sense, commitment to the institution and solidarity with the population. Today, the IMSS is ready to face not only the present but also the future and anticipate what is best for the institution and its insured population.