Doctors no longer expected to provide free services to patients at hospitals.
Date: 1900s
Prior to the 20th century, care was provided for free in hospitals. However, with the increasing prevalence of surgery, and the development of "organized medicine" through groups like the American Medical Association (AMA), professionalization pushes doctors to begin charging for hospital-based care and expecting high wages in return for their services. This coincides with the development of health insurance plans in the U.S.