After the Medigap Open Enrollment Period, insurers can refuse to sell you a Medigap policy, delay coverage, or charge you a higher premium because of an existing health condition. The insurance company may also ask you to submit to a medical underwriting process and deny you coverage or charge you a higher rate based on its findings.
Medicare supplement insurance is an add-on to Medicare parts A and B. It’s also called Medigap insurance, because it fills in for Medicare cost gaps.
Like any massive insurance enterprise, Medicare is confusing. Medicare.gov offers hundreds of pages of explanation, but luckily the basics of the program aren’t difficult to grasp. As the cliché goes, however, the devil is in the details.