Liz Weston

Dear Liz: You recently wrote about how Medicare coverage interacts with employer coverage. My husband will retire next year at age 65. His company has over 20 employees, so it’s considered a large company plan that won’t require him to sign up for Medicare. Is it better for him to elect family COBRA coverage for 36 months and defer Medicare coverage, since his company healthcare plan will be superior to Medicare? Can he elect Medicare coverage once COBRA terminates? Coverage matters more than costs.

Answer: He shouldn’t put off signing up for Medicare, because COBRA won’t insulate him from penalties.

The previous column mentioned that Medicare Part A, which covers hospital visits, is usually premium-free, but people generally pay premiums for Medicare Part B, which covers doctor’s visits, and Medicare Part D, which covers prescription drugs.

Failing to sign up when you’re first eligible for Part B and Part D typically means incurring permanent penalties that can be substantial. You can avoid the penalties if you’re covered by a large employer health insurance plan — but that plan must be as a result of current employment, either yours or your spouse’s. Once your husband retires, his employment is no longer current, so he should sign up for Medicare to avoid penalties.

If you or any other dependents need coverage, he may end up paying for additional insurance through COBRA on top of what he pays for Medicare. He can have both COBRA and Medicare for himself if his Medicare benefits become effective on or before the day he elects COBRA coverage. If he starts Medicare after he signs up for COBRA, his COBRA benefits would cease but coverage for you and any dependent children could be extended for up to 36 months. Another option to consider would be to cover you and any dependents using a plan from an Affordable Care Act marketplace. You may want to discuss your options with an insurance agent before deciding.

In fact, getting expert opinions is a must, because Medicare rules and health insurance in general can be so complex. Anyone nearing 65 also would be smart to discuss their individual situations with their company’s human resources department and then confirm the information with Medicare before deciding when and how to sign up.