Latin American social medicine (LASM) emerged as a movement in the 1970s and played an important role in the Brazilian health care reform of the 1980s, both of which focused on decentralization and on health care as a social right. The dominant health care reform model in Latin America has included a market-driven, private subsystem for the insured and a public subsystem for the uninsured and the poor. In contrast, the Mexico City government has launched a comprehensive policy based on social rights and redistribution of resources. A universal pension for senior citizens and free medical services are financed by grants, eliminating routine government corruption and waste. The Mexico City policy reflects the influence of Latin American social medicine. In this article, I outline the basic traits of LASM and those of the prevailing health care reform model in Latin America and describe the Mexico City social and health policy, emphasizing the influence of LASM in values, principles, and concrete programs.