In a letter sent to the U.S. Department of Health and Human Services (HHS) Acting Secretary Norris Cochran, two leading Medicare beneficiary advocacy organizations, the Medicare Rights Center and the Center for Medicare Advocacy, urge the Biden Administration to take swift action to strengthen Medicare, Medicaid, and the Affordable Care Act. As outlined in the letter, matters requiring immediate attention include simplifying Medicare transitions during the COVID-19 public health emergency, enhancing Medicare outreach and enrollment strategies, and increasing regulatory review efforts. Looming deadlines and unmet needs make these improvements urgent.