Can I have Medicare Advantage and Medicare Supplement insurance at the same time?

No. Medicare Supplement plans work with Original Medicare. They do not pay Medicare Advantage plan premiums, deductibles, copayments, or coinsurance. You must choose between Medicare Advantage and Original Medicare with a Medicare Supplement plan.

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From the Blog:

Medicare Supplement (Medigap) Underwriting

You want to enroll in a new Medicare Supplement plan after being on a different Medicare plan for a few years.
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