Final answer:
A Health Maintenance Organization (HMO) is a formal system of providers and site of care that provides both health care services and an insurance plan to patients in a particular geographic area.
Step-by-step explanation:
The formal system of providers and site of care that provide both health care services and an insurance plan to patients in a particular geographic area is known as a Health Maintenance Organization (HMO).
An HMO is a type of managed care organization that contracts with medical care providers, such as doctors and hospitals, to create a network of providers for patients to choose from. Patients who enroll in an HMO plan typically receive all their health care services through the providers within the network, and the HMO is responsible for coordinating their care.
For example, an HMO may have contracts with primary care physicians, specialists, hospitals, and other healthcare professionals. When a patient needs medical care, they must seek treatment from a provider within the HMO's network in order to receive coverage and access to the benefits of their insurance plan.