If you believe you have been misled into joining a Medicare Advantage plan, you will have a SEP allowing you to switch out of a plan that you joined based on erroneous, incomplete, or ambiguous information of the kind that is intended to confuse Medicare beneficiaries through unclear language. You must apply to Medicare for this Special Enrollment Period, and your case will be further investigated. If the investigating party (Medicare) decides that your claim is valid, you will be able to join another Medicare Advantage plan or switch back to traditional Medicare if originally enrolled in a Medicare Advantage plan. You may also decide to join a stand-alone Part D drug plan in this case as well.