If you work for a company with 20 or more employees, your employer must offer you (through age 69) the same health insurance coverage offered to younger employees. After you reach age 65, you may choose between Medicare and your company’s plan as your primary insurer. If you elect to remain in the company plan, it will pay first – for all benefits covered under the plan – before Medicare is billed. In most instances, it is to your advantage to accept continued employer coverage.
But be sure to enroll in Medicare Part A, which covers hospitalization and can supplement your group coverage at no additional cost to you. You can save on Medicare premiums by not enrolling in Medicare Part B until you finally retire. Bear in mind, though, that delayed enrollment is more expensive and entails a waiting period for coverage.