Medicare Part C, commonly called Medicare Advantage, covers everything Original Medicare (Parts A and B) covers, plus additional benefits that vary by plan. These plans are sold by private insurance companies approved by Medicare, and most also bundle in prescription drug coverage. The result is an all-in-one alternative to Original Medicare that often includes extras like dental, vision, and hearing care at no additional premium.
What Every Plan Must Cover
Every Medicare Advantage plan is legally required to cover all services that Part A (hospital insurance) and Part B (medical insurance) cover. That means inpatient hospital stays, skilled nursing facility care, home health services, doctor visits, preventive screenings, lab tests, durable medical equipment, and outpatient procedures are all included regardless of which plan you choose.
The key difference from Original Medicare is how you access those services. Medicare Advantage plans use networks, cost-sharing structures, and annual out-of-pocket maximums that Original Medicare does not have. So while the menu of covered services is the same or broader, the rules for getting those services differ significantly depending on your plan type.
Prescription Drug Coverage
Most Medicare Advantage plans bundle prescription drug coverage (Part D) directly into the plan. These are called MAPD plans. If you join an HMO or PPO Medicare Advantage plan that includes drug coverage, you cannot also enroll in a separate standalone Part D plan. If your HMO or PPO does not include drug coverage, you still cannot join a separate drug plan, so choosing a plan without it means going without.
The exception is Private Fee-for-Service (PFFS) plans and Medical Savings Account (MSA) plans. If either of those types does not include drug coverage, you can join a standalone Part D plan on your own. All Special Needs Plans are required to include Part D drug coverage.
Extra Benefits Beyond Original Medicare
This is where Medicare Advantage plans stand apart. Most plans offer supplemental benefits that Original Medicare simply does not provide. The most common extras are routine dental care, vision exams and eyeglasses, and hearing exams and hearing aids. The scope of these benefits varies widely. One plan might cover two dental cleanings a year while another covers major dental work like crowns or dentures.
Fitness programs are another popular benefit. SilverSneakers, a health and fitness program designed for adults 65 and older, is offered through some Medicare Advantage plans at no extra cost. It includes access to participating gym facilities, pools, walking tracks, fitness classes ranging from cardio to yoga, online workout resources, and community classes held in local parks and recreation centers. Original Medicare does not cover gym memberships or fitness programs of any kind.
Some plans also offer allowances for over-the-counter health products, routine transportation to medical appointments, and telehealth visits with no copay.
Benefits for People With Chronic Conditions
Medicare Advantage plans can offer a special category of non-medical benefits to enrollees who have chronic illnesses. These go well beyond what most people expect from a health insurance plan and are designed to address the day-to-day barriers that make managing a chronic condition harder.
Covered benefits in this category can include home-delivered meals or grocery items like produce and canned goods, transportation for non-medical errands such as grocery shopping or banking, structural home modifications like wheelchair ramps or widened doorways, pest control services, indoor air quality equipment such as portable air conditioners and HEPA filters, and companion care or caregiver support classes. Some plans even provide assistance with housing costs, utility bills, or setting up a power of attorney. These benefits are not available in every plan and are limited to members who meet specific chronic illness criteria, but they represent a significant expansion of what “health coverage” can mean.
How Plan Types Affect Your Coverage
The type of Medicare Advantage plan you choose determines how freely you can see providers and whether you need referrals.
- HMO plans require you to use doctors and hospitals within the plan’s network, except for emergencies or urgent care. You need a referral from your primary care doctor to see a specialist. Some HMO Point-of-Service plans allow limited out-of-network care at a higher cost.
- PPO plans also have a provider network but let you see out-of-network providers for a higher copay or coinsurance. No referrals are needed to see specialists.
- PFFS plans allow you to visit any Medicare-approved provider who accepts the plan’s payment terms. No referrals are required. If the plan has a network, going outside it typically costs more.
All three types cover the same underlying Medicare services. The difference is in how much flexibility you have and how much you pay when you go outside the network.
Special Needs Plans
Special Needs Plans (SNPs) are a subset of Medicare Advantage designed for people with specific circumstances. There are three types. Dual Eligible SNPs (D-SNPs) serve people who qualify for both Medicare and Medicaid, helping coordinate benefits between the two programs. Chronic Condition SNPs (C-SNPs) limit membership to people with particular chronic illnesses or groups of related conditions, tailoring their covered services, provider networks, and drug formularies to those needs. Institutional SNPs (I-SNPs) are built for people living in nursing facilities or other institutional settings.
To join any SNP, you need both Part A and Part B, must live in the plan’s service area, and must meet the eligibility criteria for that specific plan type. Every SNP includes prescription drug coverage.
The Part B Premium Giveback
Some Medicare Advantage plans offer a benefit that reduces or eliminates your monthly Part B premium. This is called the Part B giveback benefit, and it works as a credit applied to your Social Security check or Medicare bill, not as cash. The reduction can range from as little as 10 cents per month to the full Part B premium cost of $185 per month in 2025. Availability depends on where you live, as the giveback is restricted to certain states and counties. If you are already paying your Part B premium and enroll in a qualifying plan, the rebate is applied automatically once enrollment is processed.
What Part C Does Not Cover
Medicare Advantage plans cannot cover less than Original Medicare, but they are not unlimited. Cosmetic surgery, long-term custodial care (help with daily activities like bathing or dressing when that is the only care you need), and most care received outside the United States are still excluded, just as they are under Original Medicare.
Plans may also require prior authorization before covering certain procedures or specialist visits. A 2024 federal rule aims to streamline and speed up prior authorization processes, with key provisions taking effect in 2026 and 2027. Until then, delays in approval remain one of the most common frustrations for Medicare Advantage enrollees. Checking whether a service requires prior authorization before scheduling it can save you unexpected costs and wait times.