Most people new to Medicare are automatically enrolled because they are receiving Social Security when they become eligible. But a growing number are not and must enroll on their own, taking into consideration specific timelines, intricate rules, and existing coverage. Mistakes are common and carry serious consequences, such as lifelong financial penalties, high out-of-pocket costs, disruptions in care, and gaps in coverage. Yet, few remedies are available to help beneficiaries correct honest missteps. The Medicare Rights Center supports reducing the likelihood of mistakes—including by simplifying the enrollment process and better empowering beneficiary decision-making—and improving relief opportunities for those who need them.