How Medicare Supplement Insurance (Medigap) policies work with Medicare Advantage Plans

Medigap policies can't work with Medicare Advantage Plans. If you have a Medigap policy and join a Medicare Advantage Plan (Part C), you may want to drop your Medigap policy. Your Medigap policy can't be used to pay your Medicare Advantage Plan copayments, deductibles, and premiums.

If you want to cancel your Medigap policy, contact your insurance company. If you leave the Medicare Advantage Plan, you might not be able to get the same Medigap policy back, or in some cases, any Medigap policy unless you have a "trial right."

If you have a Medicare Advantage Plan, it's illegal for anyone to sell you a Medigap policy unless you're switching back to Original Medicare. Contact your State Insurance Department if this happens to you.

If you want to switch to Original Medicare and buy a Medigap policy, contact your Medicare Advantage Plan to see if you're able to disenroll.

If you join a Medicare Advantage Plan for the first time, and you aren’t happy with the plan, you’ll have special rights to buy a Medigap policy if you return to Original Medicare within 12 months of joining.

  • If you had a Medigap policy before you joined, you may be able to get the same policy back if the company still sells it. If it isn’t available, you can buy another Medigap policy.
  • The Medigap policy can no longer have prescription drug coverage even if you had it before, but you may be able to join a Medicare Prescription Drug Plan (Part D).
  • If you joined a Medicare Advantage Plan when you were first eligible for Medicare, you can choose from any Medigap policy.