Public health emergencies and the public health/managed care challenge.

The relationship between insurance and public health is an enduring topic in public health policy and practice. Insurers share certain attributes with public health. But public health agencies operate in relation to the entire community that they are empowered by public law to serve and without regard to the insurance status of community residents; on the other hand, insurers (whether managed care or otherwise) are risk-bearing entities whose obligations are contractually defined and limited to enrolled members and sponsors. Public insurers such as Medicare and Medicaid operate under similar constraints. The fundamental characteristics that distinguish managed care-style insurance and public health become particularly evident during periods of public health emergency, when a public health agency's basic obligations to act with speed and flexibility may come face to face with the constraints on available financing that are inherent in the structure of insurance. Because more than 70% of all personal health care in the United States is financed through insurance, public health agencies effectively depend on insurers to finance necessary care and provide essential patient-level data to the public health system. Critical issues of state and federal policy arise in the context of the public health/insurance relations during public health emergencies. These issues focus on coverage and the power to make coverage decisions, as well as the power to define service networks and classify certain data as exempt from public reporting. The extent to which a formal regulatory approach may become necessary is significantly affected by the extent to which private entities themselves respond to the problem with active efforts to redesign their services and operations to include capabilities and accountability in the realm of public health emergency response.