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Q&A: Should I get Medicare supplemental insurance?

May 4, 2026 By Liz Weston Leave a Comment

Dear Liz: I’m about to retire and have decided on original Medicare with a Medigap policy rather than Medicare Advantage. Can a Medigap company cancel your medical plan, and can they deny a medical procedure? Are there extra charges for preexisting conditions or other coverage issues?

Answer: Medigap is another name for Medicare supplement insurance. This coverage is provided by private insurers to help pay out-of-pocket costs such as deductibles, co-payments and co-insurance for treatments approved by Medicare.

If you apply for a Medicare supplemental policy during your initial enrollment period, you have something known as “guaranteed issue rights.” The insurer offering the policy can’t deny coverage or charge you extra for preexisting conditions. If Medicare approves a treatment or procedure, the supplemental coverage applies — the insurer can’t independently decide to deny you.

If you miss that initial enrollment period, however, you may be subject to medical underwriting. An insurer can charge you more, impose waiting periods or refuse to issue you a policy.

Your initial enrollment period typically starts when you turn 65 and sign up for Part B, the part of Medicare that covers doctors’ visits. If you delay Part B because you have employer-provided health insurance, then the six-month open enrollment period will start after you sign up for Part B. (You have eight months after your employer coverage ends to enroll in Part B without penalty.)

An insurer can cancel a Medigap policy only if you stop paying your premiums, you provide false information on your application or the insurer becomes insolvent. If you lose your coverage through no fault of your own, you would have guaranteed issue rights to buy a Medigap policy from another insurer.

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Filed Under: Medicare, Q&A, Real Estate Tagged With: Medicare, Medicare supplement insurance plans, Medicare supplemental plan, Medigap

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