Free Guide to AEP Payment Methods and Options

Understanding AEP and What It Covers

The Annual Enrollment Period, commonly called AEP, is a specific time each year when people with Medicare can make changes to their health and prescription drug coverage. AEP typically runs from October 15 through December 7. During this window, you can switch from Original Medicare to a Medicare Advantage plan, move between different Medicare Advantage plans, drop a plan and return to Original Medicare, or make changes to prescription drug coverage through a Part D plan.

AEP is different from the Initial Enrollment Period, which occurs when you first become eligible for Medicare at age 65, and different from other special periods that may open if you experience certain life events like moving to a new state or losing employer coverage. Understanding when AEP occurs and what changes you can make during this time helps you make informed decisions about your coverage without facing potential penalties for late enrollment.

Medicare currently covers hospital insurance (Part A), medical insurance (Part B), prescription drugs (Part D), and supplemental or alternative coverage through plans like Medigap or Medicare Advantage (Part C). As of 2024, approximately 28.6 million people were enrolled in Medicare Advantage plans, representing about 46 percent of all Medicare beneficiaries. This significant enrollment number shows that many people view the different payment and coverage options available during AEP as meaningful choices for their situation.

The reason AEP exists is to allow beneficiaries to adjust their coverage based on changes in their health needs, prescription medications, preferred doctors, or financial circumstances. Insurance companies also use AEP to update their plan offerings, adjust premium amounts, and modify coverage details. Knowing what AEP is and what it allows you to do forms the foundation for understanding how to evaluate and potentially change your payment methods and coverage options.

Practical Takeaway: Mark October 15 on your calendar each year and plan to review your current Medicare coverage during AEP. Write down any changes in your health, medications, or doctors so you can compare plans thoughtfully during this window.

Original Medicare Payment Structure

Original Medicare, which includes Part A (hospital insurance) and Part B (medical insurance), operates on a straightforward payment model where you typically pay monthly premiums, deductibles, and coinsurance amounts. Most people who have worked at least 10 years in jobs where they paid Medicare taxes do not pay a monthly Part A premium. Part B premiums are deducted from Social Security checks for most beneficiaries, though the amount varies based on income.

Under Original Medicare, you pay a Part A deductible of $1,632 per benefit period for hospitalization as of 2024. A benefit period begins the day you enter the hospital and ends 60 days after you leave the hospital with no readmission. For each day you stay in the hospital after day 60 within a benefit period, you pay a coinsurance amount of $408 per day. If you need skilled nursing care following a hospital stay, you pay nothing for the first 20 days, then $204 per day for days 21 through 100.

Part B covers physician services, outpatient care, and some medical equipment. For Part B, you pay an annual deductible of $240 as of 2024, and then you typically pay 20 percent of the approved amount for services after the deductible is met. For Part B services like doctor visits and laboratory tests, Medicare pays 80 percent and you pay 20 percent. This cost-sharing continues throughout the year with no out-of-pocket maximum under Original Medicare alone, meaning your costs could potentially be very high if you have significant medical needs.

One important feature of Original Medicare is that you can see any doctor or hospital that accepts Medicare without needing referrals. You also have the option to purchase a Medigap (supplemental insurance) policy to help cover the costs that Original Medicare does not pay, such as deductibles and coinsurance. Many people who stay on Original Medicare and add a Medigap policy find this combination offers predictability and flexibility in their healthcare choices.

Practical Takeaway: If you choose Original Medicare, calculate your expected out-of-pocket costs based on your anticipated healthcare needs, and research whether a Medigap policy might help you manage those costs more predictably.

Medicare Advantage Plan Payment Methods

Medicare Advantage plans, also called Part C, are alternative ways to receive your Medicare benefits through private insurance companies approved by Medicare. These plans must cover at least everything Original Medicare covers for hospital, medical, and emergency care. Most Medicare Advantage plans also include prescription drug coverage built in, so you do not need to purchase Part D separately. As of 2024, there are over 3,800 different Medicare Advantage plans available across the country, with an average of 36 different plans per county.

Medicare Advantage plans typically operate using a network model, meaning you usually must see doctors and hospitals within the plan's network, except in emergencies. The main types of Medicare Advantage plans are Health Maintenance Organizations (HMOs), Preferred Provider Organizations (PPOs), and Private Fee-for-Service (PFFS) plans. HMO plans generally have lower premiums but require you to use network doctors and get referrals for specialist care. PPO plans offer more flexibility to see out-of-network doctors but typically charge higher premiums and out-of-pocket costs. PFFS plans allow you to see any doctor that accepts Medicare, but the plan determines how much it will pay for services.

With Medicare Advantage plans, you typically pay a monthly premium in addition to your Part B premium. Unlike Original Medicare, most Medicare Advantage plans have an out-of-pocket maximum, which is a yearly limit on how much you will pay for covered services. In 2024, the maximum out-of-pocket limit is $7,550 for in-network services in HMO and PPO plans. Once you reach this limit, the plan pays 100 percent of covered services for the remainder of that calendar year. Some Medicare Advantage plans charge zero monthly premiums but have higher deductibles and coinsurance amounts. Others charge higher premiums but provide lower out-of-pocket costs.

Many Medicare Advantage plans offer supplemental benefits that Original Medicare does not cover, such as fitness programs, dental care, vision care, hearing aids, or transportation services. These added benefits make Medicare Advantage plans particularly attractive to people whose health or lifestyle needs extend beyond what Original Medicare provides. However, the availability of these benefits varies significantly by plan and location.

Practical Takeaway: When comparing Medicare Advantage plans during AEP, list your current doctors and medications, then check whether they are covered in-network. Calculate total expected out-of-pocket costs based on your actual healthcare needs, not just premium amounts.

Prescription Drug Coverage Options

Prescription drug coverage under Medicare Part D protects you from extremely high medication costs through a system that shares expenses between you and your insurance plan. Part D plans are offered by private insurance companies and include a standard benefit structure that changes yearly. If you have Original Medicare, you must choose a separate Part D plan. If you have a Medicare Advantage plan, it almost always includes prescription drug coverage, and you cannot also enroll in a separate Part D plan.

Part D plans operate in distinct payment stages throughout the calendar year. First, you pay a monthly premium. Then, you pay an annual deductible, which was $545 in 2024. After you meet the deductible, you enter the initial coverage phase where you typically pay 25 percent of drug costs and the plan pays 75 percent until you and the plan together have spent $5,430 on covered medications. This threshold is called the Initial Coverage Limit. Beyond this point, you enter the coverage gap, sometimes called the "donut hole," where you pay a higher percentage of drug costs. In 2024, you pay 25 percent of brand-name drugs and generic drugs in the coverage gap, with a cap on your costs.

Once your out-of-pocket spending reaches $8,000 in 2024, you enter catastrophic coverage where the plan pays most of your medication costs and you pay only a small coinsurance amount or copayment. This catastrophic phase continues through the end of the year. The coverage gap has become less burdensome in recent years due to legislative changes that gradually reduced what people pay for medications during this phase.

Choosing a Part D plan requires understanding your current and expected medications. Medicare provides a plan finder tool on its website where you can enter your medications and see which plans offer the lowest total costs including premiums, de