Medicare Part C, commonly known as Medicare Advantage (MA), is an alternative to Original Medicare offered by private insurance companies approved by Medicare. These plans bundle Part A (hospital) and Part B (medical) coverage into a single plan, and most also include Part D (prescription drug) coverage.
Medicare Advantage plans often provide additional benefits not available through Original Medicare, such as dental, vision, hearing, fitness programs, and over-the-counter allowances. In exchange, enrollees typically must use a network of providers and may need referrals to see specialists.
As of 2025, over 33 million Americans are enrolled in Medicare Advantage plans, representing more than half of all Medicare beneficiaries. Major insurers offering MA plans include UnitedHealthcare, Humana, Aetna, Cigna, Blue Cross Blue Shield, and Kaiser Permanente.