Final answer:
The primary health coverage for Sam, who is employed by a large corporation and is eligible for Medicare, would depend on the number of employees at his company. For companies with 20 or more employees, the company's health plan is primary. Medicare is primarily designed for individuals over 65 or with certain disabilities.
Step-by-step explanation:
If Sam works for a large corporation and is also eligible for Medicare, his primary health coverage would depend on the size of his employer. Generally, if the company has 20 or more employees, the employer's health plan would be the primary payer and Medicare would be secondary. However, if the employer has fewer than 20 employees, Medicare is usually the primary payer. It is important for Sam to check with his employer's benefits administrator to confirm the coordination of benefits.
Medicare is a federal system of health insurance mainly for people over 65 years old, while Medicaid is a program that offers health care assistance to individuals and families with low incomes. Therefore, since Sam is eligible for Medicare, and not Medicaid, this implies he is likely over 65 or has a qualifying disability. Under The Affordable Care Act, many Americans can also purchase health insurance through a state government-sponsored health exchange market.