This article provides an overview of the Medicare service, including its function, administration, client groups, critique, effectiveness, positive and negative aspects, and ways to improve. It discusses how Medicare caters to the medical needs of the aged and those with physical disabilities, and the funding and administration of the service. It also examines the effectiveness of the service in achieving its stated purpose, as well as the positive and negative aspects of the service. Finally, it suggests ways to improve the Medicare service.