注意這段話

Note, however, that in most cases, when you switch from Medicare Advantage to Original Medicare, you lose your “guaranteed-issue” rights for Medigap. You generally have guaranteed-issue rights for six months when you are both 65 or older and enrolled in Medicare Part B. Guaranteed-issue rights ensure that you can buy any plan sold in your state, and that you won’t be charged higher premiums based on your health status.