Considering a Medigap plan? You’ll want to during the Medigap Open Enrollment Period. It begins as soon as you are 65 and enrolled in Original Medicare. It lasts for a total of six months, and you will have the option to enroll in a plan without the worry of being turned down for coverage.
Missing this period doesn’t mean you can’t enroll in Medigap, but it will be much harder to find a plan at the price you want. You may also have to go through the underwriting process.