More than 34 million Medicare beneficiaries, or 54% of the eligible Medicare population, are enrolled in Medicare Advantage plans as of 2025. This private alternative to Original Medicare has become the dominant form of Medicare coverage in many parts of the country.
Medicare Advantage, also called Medicare Part C, is a private insurance alternative to Original Medicare. Private insurers contract with the federal government to provide Part A and Part B benefits to enrollees. The government pays these insurers a fixed monthly amount per enrollee, and the insurers use that money to pay for Medicare-covered services, plus often additional benefits like dental and vision.
The main selling points are simple: lower premiums, capped out-of-pocket costs, and extra benefits that Original Medicare does not cover. But those benefits come with trade-offs. Provider networks are narrower. Prior authorization requirements are more common. And you lose the ability to buy a Medigap supplement plan to cover the cost-sharing.
This guide walks through how Medicare Advantage actually works for 2026, what it covers, what it costs, and who it makes sense for.
Part C: What is Medicare Advantage?
Medicare is split into four main parts. Part A covers inpatient hospital care. Part B covers outpatient services and doctor visits. Part D covers prescription drugs. Part C is the all-in-one alternative.
Medicare Advantage plans are offered through Medicare-approved private insurance companies. When a beneficiary enrolls in a Medicare Advantage plan, their Original Medicare benefits are administered through the insurance company they chose, rather than directly through the government.
The plans bundle Parts A and B into a single plan and usually include Part D for prescription drug coverage as well. In 2026, 96% of Medicare Advantage enrollees are in plans that include prescription drug coverage.
In many ways, these plans look similar to employer-sponsored health insurance. They have provider networks, copays, prior authorization requirements, and out-of-pocket maximums.
How Medicare Pays For Medicare Advantage?
Medicare pays private insurers a set amount per enrollee per month. That amount varies by county, the health status of the plan’s enrollees, the plan’s quality star rating, and the plan’s estimated costs of covering Medicare Part A and Part B services.
Plans use these payments to pay for Medicare-covered services and, in most cases, to also pay for supplemental benefits and reduced cost-sharing. In 2026, plans receive an additional $2,664 per enrollee above their estimated costs of providing Medicare-covered services, according to MedPAC. This portion, called the rebate, has more than doubled since 2018.
Plans are able to offer $0 premiums and extra benefits like dental and vision because of these rebates. According to MedPAC, individual plans allocated about 26% of these rebates toward Part D benefits in 2026, including reducing Part D premiums.
What Medicare Advantage Plans Cover?
Everything Original Medicare Covers
Medicare Advantage plans must cover the same services as Original Medicare. That means everything covered under Part A and Part B is included. The difference is in how you access that care. The private plan administers the benefits, not the government.
Supplemental Benefits Original Medicare Does Not Cover
The real attraction of Medicare Advantage is the extra benefits. These are things Original Medicare does not cover at all.
- Dental, Vision, and Hearing: Nearly all individual Medicare Advantage plans, 98% or more, offer these benefits. A dental benefit may include cleanings and preventive care or more comprehensive coverage, often subject to an annual dollar cap. Similar limits apply to vision and hearing benefits.
- Fitness Benefits: Most plans offer fitness benefits, including gym memberships.
- Over-the-Counter Allowances: 66% of individual plans offer an allowance for over-the-counter items in 2026, down from 73% in 2025.
- Meal Benefits: 57% of plans offer a meal benefit in 2026, down from 65% in 2025.
- Transportation: 24% of individual plans offer transportation benefits for medical needs in 2026.
- Part B Premium Rebate. Nearly one-third (32%) of individual plans offer a reduction in the Part B premium ($202.90 in 2026) as a supplemental benefit. Among plans offering this benefit, 36% reduce the premium by more than $100 a month.
Special Plans for Special Needs
Special Needs Plans (SNPs) are Medicare Advantage plans designed for specific populations: people with Medicaid, people in institutions, or people with severe chronic diseases. SNPs offer even more targeted supplemental benefits. For example, 25% of SNPs offer in-home support services in 2026, up from 17% in 2025. SNPs are also more likely to offer transportation benefits (67% vs 24% for individual plans) and caregiver support (16% vs 5%).
What Medicare Advantage Costs in 2026?
Premiums
In 2026, three quarters (75%) of enrollees in individual Medicare Advantage plans with prescription drug coverage pay no premium other than the Medicare Part B premium. That $202.90 per month Part B premium is still required, regardless of which Medicare Advantage plan you choose.
The average supplemental premium, including enrollees who pay nothing, is $15 a month in 2026. For the 25% of beneficiaries in plans that do charge a premium (5 million people), the average premium is $59 per month.
HMOs tend to have lower premiums ($12 per month on average in 2026) compared to PPOs ($18 per month).
Out-of-Pocket Limits
This is one of the biggest differences between Medicare Advantage and Original Medicare. Original Medicare has no cap on out-of-pocket costs. Medicare Advantage plans are required by federal regulation to provide an out-of-pocket limit for services covered under Parts A and B.
In 2026, the maximum allowable out-of-pocket limit is $9,250 for in-network services and $13,900 for in-network and out-of-network services combined, though plans can offer lower limits.
The average out-of-pocket limit for all Medicare Advantage enrollees is $5,421 for in-network services. For PPO enrollees, the average out-of-network combined limit is $9,825. HMOs generally only cover in-network services, so the average in-network limit for HMO enrollees is $4,636. PPOs have higher average limits at $6,592.
Just over one in ten enrollees (13%) are in plans with in-network limits of $3,000 or less. Nearly one in five (19%) are in plans with limits above $7,000.
Prescription Drug Costs Under Part D
Medicare Advantage plans with prescription drug coverage have a separate out-of-pocket cap for Part D spending. In 2026, that cap is $2,100. Once a beneficiary reaches that limit, their prescription plan pays for 100% of covered medications for the rest of the year.
The extra benefits and lower premiums in Medicare Advantage come with trade-offs.
Original Medicare enrollees have access to almost every doctor and hospital in the United States. Medicare Advantage enrollees typically have access to about half of the physicians available to Original Medicare beneficiaries in their area, on average.
Medicare Advantage plans must meet a standard of “network adequacy,” meaning enrollees must have access to at least 29 types of healthcare professionals and 14 kinds of facilities within certain distances and travel times. But this is still a narrower set of options than Original Medicare.
HMOs generally only cover services provided in-network. PPOs cover out-of-network services, typically for higher cost-sharing.
More than 6 in 10 Medicare Advantage enrollees (61%) are in HMO plans. HMOs typically require referrals from a primary care provider to see specialists. PPOs generally do not.
Nearly all Medicare Advantage enrollees (99%) are in plans that require prior authorization for some services. Prior authorization is most often required for relatively expensive services such as inpatient hospital stays (97%), skilled nursing facility stays (95%), Part B drugs (94%), and home health services (90%). It is rarely required for preventive services (6%).
Prior authorization is a cost-control tool that private plans use to assess whether health care services are medically necessary before they are covered. In 2024, Medicare Advantage plans had nearly 53 million prior authorization requests, or about 1.7 requests for every enrollee.
Medicare Advantage Enrollment: Who Can Join and When?
To enroll in a Medicare Advantage plan, an individual must have Medicare Part A and Part B, live in the plan’s service area, and be a U.S. citizen or lawfully present.
There are several enrollment periods:
- Initial Coverage Election Period (ICEP). The period when a beneficiary first becomes eligible for Medicare. This is when they can choose between Original Medicare and Medicare Advantage.
- Annual Coordinated Election Period (AEP). October 15 to December 7 each year. This is when beneficiaries can switch plans or switch to Original Medicare for coverage starting January 1.
- Medicare Advantage Open Enrollment Period (MA OEP). January 1 to March 31 each year. This period allows existing Medicare Advantage enrollees to switch to a different Medicare Advantage plan or switch to Original Medicare.
- Special Election Periods (SEPs). These are triggered by specific life events, such as moving out of the plan’s service area, losing employer coverage, or qualifying for the Extra Help program.
Who Is Medicare Advantage Right For?
Medicare Advantage plans are not inherently better or worse than Original Medicare. They are different. The right choice depends on your specific needs and priorities.
Medicare Advantage may be a good fit if you:
- Want a cap on your out-of-pocket costs
- Value extra benefits like dental, vision, and hearing
- Are comfortable with a narrower network of providers
- Want a plan that bundles medical and prescription drug coverage into one package
- Are willing to get referrals and prior authorization for some services
Original Medicare may be a better fit if you:
- Want to see any doctor or hospital that accepts Medicare
- Travel frequently and need coverage across the country
- Are willing to pay a Medigap premium to cap your out-of-pocket costs
- Do not want to deal with prior authorization requirements for most services
How to Compare Medicare Advantage Plans
When comparing plans, look beyond the monthly premium. Consider:
- Are your doctors and hospital in-network? If you have a specialist you want to continue seeing, check that they are in the plan’s network.
- Lower limits mean less financial exposure. HMO plans typically have lower limits than PPOs.
- If you take prescription drugs, check that your medications are on the plan’s formulary. Also look at the drug cost-sharing tier and what your cost would be.
- Dental, vision, and hearing benefits vary widely. Check the details. An annual dental cap of $500 is very different from a cap of $1,500. Some plans include vision allowances while others cover a full exam.
- If you expect expensive or complex care, look at which services require prior authorization and how the approval process works.
Conclusion
Medicare Advantage has become the dominant form of Medicare coverage in the United States, with more than 34 million beneficiaries choosing this private alternative to Original Medicare. The appeal is clear: the average out-of-pocket limit is $5,421 for in-network services, 75% of enrollees pay no premium beyond the Part B premium, and nearly all plans offer extra benefits like dental, vision, and hearing.
But Medicare Advantage is not for everyone. Original Medicare offers access to 99% of physicians nationwide, no prior authorization requirements for most services, and the ability to buy Medigap to cover cost-sharing. Medicare Advantage plans trade that flexibility for lower premiums, capped out-of-pocket costs, and extra benefits.
The right choice depends on your specific health needs, your provider preferences, and your financial priorities. The key is to compare plans in your area during the Annual Coordinated Election Period from October 15 to December 7, look beyond the premium to the out-of-pocket limit and network coverage, and choose the plan that fits your actual health care needs.
