Original Medicare is the foundation of health insurance for America’s seniors aged 65 and older, as well as those who qualify earlier due to disability. While it provides broad coverage, it also leaves gaps. Beneficiaries are still responsible for cost-sharing in the form of deductibles, coinsurance, and copays. Because of these gaps, private insurers offer two key alternatives: Medicare Supplement policies and Medicare Advantage plans.
Medicare Advantage plans, also called Part C, operate differently from both Original Medicare and Medicare Supplement (Medigap) policies. They can bundle coverage in ways that add convenience but also come with limitations. If you are exploring your options, here are five essential things to know about Medicare Advantage.
1. Part A and Part B Come From the Carrier
When you enroll in a Medicare Advantage plan, your Medicare Part A (hospital insurance) and Part B (medical insurance) benefits are no longer administered directly by the federal government. Instead, Medicare pays a private insurance company to deliver these benefits on its behalf.
Your insurer then sets the structure for your plan, including premiums, deductibles, copays, coinsurance, and your annual out-of-pocket maximum. This cap provides some financial protection since once you reach it, the plan pays 100% of covered services for the rest of the year.
Medicare requires Advantage plans to cover the same services included in Original Medicare. However, insurers can apply restrictions, such as prior authorization for certain hospital stays, durable medical equipment, or medications. These requirements sometimes create extra steps to access care, so it is important to review each plan’s rules.
2. Medicare Advantage Plans Have Networks
Unlike Original Medicare and Medigap policies, Medicare Advantage plans operate within provider networks. This means your insurer contracts with specific doctors, hospitals, and pharmacies.
Health Maintenance Organization (HMO) plans typically restrict you to in-network providers except in emergencies. If you visit an out-of-network doctor for routine care, you may be responsible for the full bill.
Preferred Provider Organization (PPO) plans offer more flexibility. You can see out-of-network providers, though you will usually pay higher costs. If having broader access to care is important to you, PPO plans may be worth considering, even if premiums or copays are slightly higher.
3. Advantage Plans Can Include Prescription Drug Coverage
Original Medicare does not cover outpatient prescriptions. If you remain with Parts A and B, you must purchase a standalone Part D plan for drug coverage. Many Medicare Advantage plans, however, include built-in Part D coverage.
This bundled structure allows you to manage both your health and prescription benefits under one plan. But it is critical to check whether your medications are included on the plan’s formulary, or list of covered drugs. If a needed prescription is not included, you may face high out-of-pocket costs. Reviewing formularies each year during open enrollment helps avoid surprises.
4. Some Plans Have Additional Benefits
One of the biggest draws of Medicare Advantage is the potential for extra benefits that Original Medicare does not provide. Depending on your area and carrier, plans may include routine dental, vision, and hearing coverage, transportation to appointments, over-the-counter allowances, gym memberships, and even meal or food delivery programs.
These benefits vary widely and are not guaranteed across all plans. More importantly, they can change from one year to the next. That is why experts advise against enrolling in a plan solely because of a popular extra like dental coverage. Your insurer could revise or remove that benefit the following year.
These extra benefits can change from year to year. So, it would be best if you didn’t enroll in a plan solely for its dental benefit because your plan might not offer that same benefit the following year. To make year-to-year changes easier to compare, look at carrier-specific cost guides that spell out how extra benefits affect premiums and out-of-pocket exposure. A clear breakdown like these BCBS medicare advantage plans, for instance, can help you see which benefits are routine versus promotional.
5. Medicare Advantage Plans Have Lock-in Periods
Unlike Original Medicare, Medicare Advantage is subject to specific enrollment windows. Once you select a plan, you are generally locked into it for the year unless you qualify for a special enrollment period.
The main opportunity to make changes is the Annual Election Period, which runs in the fall. There is also a Medicare Advantage Open Enrollment Period at the start of each year, allowing you to switch plans or return to Original Medicare if needed.
The good news is there is no medical underwriting when switching Medicare Advantage plans. Even if you have pre-existing conditions, you can still change plans during an allowed election period. This ensures continued access to coverage regardless of your health status.
Making the Right Decision
Choosing a Medicare plan is not a one-size-fits-all decision. Medicare Advantage can be a strong fit for those who want bundled coverage, predictable copays, and access to extra benefits. However, the tradeoffs often include narrower networks and stricter prior authorization rules compared to Original Medicare with a Medigap supplement.
If you are nearing eligibility, take time to evaluate your health needs, preferred doctors, prescription drugs, and budget. A licensed Medicare broker can walk you through your options and help you find the best fit. For additional official resources, visit Medicare.gov.
