The best time to get Medicare supplemental insurance, commonly referred to as Medigap, is during your Medigap Open Enrollment Period. This period automatically starts the month you turn 65 and are enrolled in Medicare Part B and lasts for six months. During this period, you have a guaranteed issue right to buy any Medigap policy sold in your state regardless of your health status. Insurers can’t charge you more based on pre-existing conditions or refuse to sell you a policy.

Outside of this open enrollment period, you might not be able to buy a Medigap policy, or it may cost more due to underwriting requirements. Some states have additional open enrollment periods or offer protections similar to the federal guaranteed issue rights, but these vary state by state.

If you miss your initial enrollment period, other times that might be advantageous are during special enrollment periods which occur when certain events happen in your life that trigger a change in your insurance needs, like if you lose other health insurance coverage. However, the availability of Special Enrollment Periods also varies based on the insurer and the state.

Moreover, if you’re covered under a Medicare Advantage Plan, you can switch to Original Medicare with a Medigap policy during the Medicare Advantage Open Enrollment Period that runs from January 1 to March 31 each year.

Remember that Medigap policies do not cover prescription drugs, so if you need this coverage, you will want to enroll in a Medicare Prescription Drug Plan (Part D) as well.

It’s crucial for Medicare beneficiaries to thoroughly research their options and timeframes to ensure they get comprehensive coverage at a cost-effective time. Consulting with professionals and reviewing current state laws can provide personalized advice specific to individual circumstances.