The Medicare Advantage Open Enrollment Period Ends March 31


Most seniors and caregivers are aware of the annual Medicare Open Enrollment Period that runs each fall from October 15 until December 7, but the Centers for Medicare and Medicaid Services (CMS) offers another important time when beneficiaries can change their health coverage.

What Is the Medicare Advantage Open Enrollment Period?

Since 2019, Medicare beneficiaries have been able to utilize the annual Medicare Advantage Open Enrollment Period (MAOEP) that runs from January 1 through March 31. This enrollment period replaced the Medicare Advantage Disenrollment Period (MADP) that used to run from January 1 through February 14 each year.

During the MAOEP, beneficiaries who are currently enrolled in Medicare Advantage Plans (also known as Part C Plans) can change their coverage if they find it does not fit their needs. Those who elect to do so can switch to a different Advantage Plan or revert to “Original Medicare,” which consists of Part A (hospital insurance) and Part B (medical insurance).

Unlike Advantage Plans, Original Medicare is offered directly through CMS rather than a private insurance company that has contracted with CMS. Beneficiaries who choose to disenroll from their Part C Plan and revert to Original Medicare also have the option to enroll in a stand-alone Prescription Drug (Part D) Plan. Any coverage changes made during the MAOEP are effective on the first of the following month.

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Beneficiaries cannot switch from Original Medicare to an Advantage Plan during this period. Furthermore, those who are already enrolled in Original Medicare may not join a Part D Plan or switch to a different Part D Plan.

4 Things to Consider During the MAOEP

If you or someone you know is considering taking advantage of the 2021 Medicare Advantage Open Enrollment Period, take care to avoid gaps in coverage. I encourage beneficiaries to consider the following important pieces of advice before acting.

  1. Know the gaps in Original Medicare.

    Like Medicare Advantage Plans, Original Medicare has deductibles and coinsurance. But, unlike Advantage Plans, Original Medicare doesn’t have a cap on annual out-of-pocket costs if you get sick or injured. In 2022, the maximum out-of-pocket (MOOP) limit for Medicare Advantage Plans is $7,550 for covered medical services. Some plans have even lower caps, which can be a real asset for some beneficiaries. It’s also important to remember that Original Medicare does not cover the cost of prescription drugs.
  2. Set your priorities for coverage.

    I encourage people to make a checklist of benefits they want to keep before dropping or switching an Advantage Plan. For example, confirm that your current doctor(s) will still see you if you change to Original Medicare or another Advantage Plan. If you take any prescription drugs, be sure to research your options and costs for drug coverage.
  3. Research Medicare Supplements.

    If you’re planning to switch to Original Medicare, you may want to consider bolstering your coverage with a Medicare Supplement Insurance policy (also known as Medigap). There are 10 different standardized Medigap Plans available in most states that are denoted by letters A through N. By law, each lettered plan must provide the exact same minimum level of supplemental coverage, so Plan A from one company must provide the same standardized base coverage as Plan A from another insurer. You can search for Medigap policies offered in your state on However, keep in mind that Medicare Supplement policies are medically underwritten. If you try to enroll in a Medigap Plan outside of your Medigap open enrollment period (the six-month period after you enroll in Part B), you may not qualify or the costs may be prohibitive.
  4. Avoid losing additional benefits.

    Some Advantage Plans provide routine dental, vision and hearing coverage, which Original Medicare does not. Medigap plans do not typically cover these services either. So, if you drop your Advantage Plan during the MAOEP, you may need to purchase stand-alone coverage for vision and dental care.

Find Help With Medicare Decisions

While the Medicare Advantage Open Enrollment Period may seem like an easy opportunity to make changes to Medicare coverage, this decision requires thorough research. Taking care to compare the extent of coverage and costs of each available option will help prevent costly surprises down the road.

If you need assistance weighing coverage options for yourself or another beneficiary, contact your State Health Insurance Assistance Program (SHIP) to arrange a free one-on-one insurance counseling session. These consultations are typically available through your local Area Agency on Aging.

Sources: The Medicare Advantage Open Enrollment Period (MA OEP) (; Joining a health or drug plan (; Maximum out-of-pocket limit (; How to compare Medigap policies (

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