Stephen Robert runs the Source of Hope Foundation along with his wife. The foundation works in American inner cities as well as African and Central and South American countries, providing needed infrastructure and facilities. One such facility is the Stephen Robert and Pilar Crespi Robert Rapid Medical Evaluation Center at the Columbia Presbyterian Hospital, a nonprofit healthcare center in New York. Nonprofit healthcare is an essential part of the American healthcare system. These institutions are registered as nonprofit corporations under the IRS 501(C)(3) code, making them tax-exempt. In exchange, they focus on serving communities by providing affordable healthcare services and charity. Many are also engaged in research. Educational institutions, foundations, and religious entities operate many of these hospitals. However, large medical corporations are currently acquiring many nonprofit hospitals. Nonprofit healthcare institutions comprise more than 60 percent of the over 5000 hospitals and other healthcare centers, such as nursing homes, in the US. This system started with charity hospitals that catered to low-income people in the 18th and 19th centuries. These charity hospitals, set up by charity organizations and religious bodies, were dependent on donations, as most of their patients couldn't pay for their medical services. Today, many nonprofit hospitals rely on medical services payments for a large part of their revenue, though many continue to receive donations and have endowments. Many nonprofit healthcare institutions' governing boards include health professionals, community members, and professional health administrators.