Final answer:
The pre-certification for an elective or planned hospital admission is typically the responsibility of the provider or the facility rendering service, especially under HMOs or managed care systems.
Step-by-step explanation:
The responsibility for requesting the pre-certification for an elective or planned hospital admission generally falls on the provider (primary care or attending physician) or the facility rendering service. In some health systems, especially those operating under health maintenance organizations (HMOs) or managed care, the physician or facility will manage the necessary administrative steps in coordination with the insurance company to ensure coverage for the procedures and services planned. This pre-certification process is integral to controlling costs and managing resources efficiently within the health care system. It is an important measure to prevent situations of adverse selection within the insurance market.