Medicare Advantage is a type of health insurance plan offered by private companies that contract with the federal government to provide benefits to Medicare beneficiaries. These plans include all the services covered by Original Medicare (Part A and Part B) and often offer additional benefits, such as vision, dental, and wellness programs. Enrollment in a Medicare Advantage plan typically occurs during specific periods, such as the annual enrollment period. Beneficiaries usually pay a monthly premium in addition to their Medicare Part B premium, and costs can vary based on the plan chosen.