Final answer:
The term describing the use of multiple health care systems is 'integrated health care,' which aims to address the increasing demands on providers and insurers due in part to an aging population and an increase in chronic conditions. The U.S. has various health care financing systems, such as fee-for-service and HMOs, facing challenges like cost control, accessibility, and adverse selection in insurance markets.
Step-by-step explanation:
The term that describes consecutive or concurrent use of multiple health care systems is often referred to as integrated health care. Integrated health care is a cohesive system in which health care professionals work together to provide comprehensive care. This approach has become necessary due to factors such as America's aging population and the increase in chronic health conditions, which have led to overwhelming demands on health care providers and insurance systems. In response, the U.S. health care industry has seen a trend towards consolidation and the adoption of efficiency models, including the rise of urgent care centers, telemedicine, and the use of artificial intelligence to manage health care delivery.
In the U.S., there are several methods of health care organization, notably the fee-for-service system where providers are reimbursed for each service they provide, and health maintenance organizations (HMOs), where they are reimbursed based on the number of patients they manage. Nevertheless, challenges such as controlling high costs, ensuring basic medical care for all, and the risk of adverse selection in insurance markets, where those most at risk are more likely to acquire insurance, persist. Hence, there exists an ongoing effort to balance quality, access, and cost within the health care system.