The Medicare Advantage Open Enrollment Period (MA OEP) gives people who are already enrolled in a Medicare Advantage plan a limited opportunity to reconsider that coverage.
The annual MA OEP runs January 1 through March 31. During this period, an eligible beneficiary can make one change: switch to another Medicare Advantage plan or leave Medicare Advantage and return to Original Medicare. If the beneficiary returns to Original Medicare, they may also be able to join a stand-alone Medicare drug plan. Changes generally take effect the first day of the month after the plan receives the request.
For insurance agents, OEP is less about creating another sales season and more about being prepared to respond appropriately when clients have questions about their coverage. CMS places specific restrictions on knowingly targeting Medicare Advantage enrollees with unsolicited OEP marketing, so agents need to understand both the enrollment rules and the marketing boundaries.
This guide brings those pieces together: who can use MA OEP, what changes are permitted, what agents should avoid, and how to prepare for client-initiated conversations.
The Medicare Advantage Open Enrollment Period is an enrollment window for people who are already enrolled in a Medicare Advantage plan.
For existing Medicare Advantage members, the annual period runs:
January 1 through March 31
During MA OEP, a beneficiary can:
A beneficiary generally gets one change during the annual MA OEP, and the change becomes effective on the first day of the month after the plan receives the enrollment request.
MA OEP does not give everyone with Medicare a general opportunity to change coverage. The beneficiary must already be enrolled in Medicare Advantage to use the annual MA OEP.
Understanding what OEP does not allow is just as important as understanding what it does.
During the annual Medicare Advantage OEP, a beneficiary generally cannot use the OEP to:
Those situations may require another valid enrollment period, such as the Annual Enrollment Period or an applicable Special Enrollment Period. Medicare.gov maintains current information about the enrollment opportunities available for different circumstances.
Agents who want a broader refresher can review PSM’s Medicare Enrollment Periods Explained: IEP, AEP, OEP and SEPs.
There is also an MA OEP opportunity for some beneficiaries who are new to Medicare and enroll in Medicare Advantage.
Medicare.gov explains that if a beneficiary joins a Medicare Advantage plan when first becoming eligible for Medicare, the opportunity runs from the first month the person has both Medicare Part A and Part B through the last day of the third month they have both.
During this period, an eligible beneficiary may:
Because timing can vary based on the beneficiary’s Medicare effective dates, agents should verify the applicable enrollment period before submitting an application.
The Annual Enrollment Period and Medicare Advantage Open Enrollment Period are often confused, but they serve different purposes.
| Enrollment period | Dates | Who can use it? | General purpose |
|---|---|---|---|
| Annual Enrollment Period (AEP) | October 15–December 7 | People with Medicare who meet applicable enrollment requirements | Broad annual opportunity to review and change Medicare health and drug coverage |
| Medicare Advantage OEP | January 1–March 31 | People already enrolled in Medicare Advantage | Limited opportunity to change MA coverage or return to Original Medicare |
During AEP, beneficiaries have a broader range of Medicare health and drug plan changes available. MA OEP is narrower and is specifically designed for qualifying Medicare Advantage enrollees. Medicare’s annual October 15–December 7 Open Enrollment changes generally take effect January 1.
For a more detailed comparison, see Medicare AEP vs. OEP: Understanding the Medicare Enrollment Periods.
A client may discover after January 1 that their Medicare Advantage plan is not working as expected.
Common concerns can include:
The first step should not automatically be a plan change.
Sometimes the appropriate response is helping the client understand or use the coverage they already have. In other cases, after reviewing the client’s situation and applicable enrollment rights, another option may warrant consideration.
When a client proactively contacts you with concerns, a structured coverage review can help identify the actual problem.
Consider reviewing:
Are the client's physicians, specialists, hospitals, and other important providers participating in the plan’s current network?
Review:
Discuss the costs relevant to the client's actual usage, which may include:
Make sure the client understands plan requirements such as:
If supplemental benefits are important to the client, verify the current plan's benefit details, eligibility, limitations, and service area rather than relying on assumptions or prior-year information.
Benefits and availability vary by plan and market.
Leaving Medicare Advantage for Original Medicare can have consequences beyond the immediate MA disenrollment.
One important consideration is Medicare Supplement insurance, or Medigap.
Returning to Original Medicare does not automatically mean a beneficiary can purchase any Medigap policy they want without underwriting. Federal guaranteed-issue rights apply in certain situations, including some trial-right circumstances, but eligibility depends on the beneficiary's specific situation. State protections can also differ. Medicare.gov advises beneficiaries to review their Medigap rights before making a coverage change.
Agents should therefore avoid treating an MA-to-Original-Medicare change as a simple two-step transaction.
Before a client makes that decision, verify:
MA OEP has specific marketing restrictions.
Current federal regulations prohibit Medicare Advantage organizations from knowingly targeting or sending unsolicited marketing materials to MA enrollees during OEP. The regulation also prohibits activities intended to target OEP as an opportunity to generate further sales.
Examples of prohibited OEP targeting include:
The rules do, however, allow certain activities when the beneficiary initiates the interaction. For example, the regulation permits providing marketing materials when a beneficiary proactively requests them and permits beneficiary-requested one-on-one meetings with sales agents. It also permits educational information about the existence of OEP on an MA organization's website, provided the material is educational rather than marketing.
Agents should also follow applicable carrier requirements, CMS guidance, consent rules, and their organization’s compliance procedures.
For broader guidance, review PSM’s Compliance Best Practices for Licensed Insurance Agents and Medicare Communication & Marketing Guidelines for Insurance Agents.
A useful way to think about OEP communication is to distinguish education and client service from targeted OEP solicitation.
Educational communication may help beneficiaries understand:
That is different from sending an unsolicited message to a known MA enrollee telling them that OEP gives them another chance to switch plans.
When in doubt, review the communication against current CMS regulations, applicable carrier requirements, and your compliance process before distributing it.
PSM agents can also explore the PSM Marketing Hub for no-cost marketing resources and support.
Use this checklist before and during OEP to keep your client-service process organized.
For additional guidance on telephone-based Medicare activity, see PSM’s Call Recording and Retention Requirements for Medicare Sales.
MA OEP is a limited enrollment opportunity, not a repeat of the Annual Enrollment Period.
A service issue may be resolved without changing coverage. Diagnose the problem first.
Medicare Advantage benefits, provider networks, formularies, costs, and plan availability can change. Verify current information for the applicable plan and service area.
A beneficiary returning to Original Medicare may not automatically have unrestricted access to Medigap coverage. Review applicable rights before the client makes the change.
Do not treat January through March as an opportunity to specifically target MA enrollees for additional sales. Current federal regulations place explicit restrictions on OEP targeting.
As an operational best practice, maintain clear records showing how an interaction began, what the beneficiary requested, what information was reviewed, and what action was taken.
For beneficiaries already enrolled in Medicare Advantage, the annual MA OEP runs January 1 through March 31.
The annual MA OEP is generally available to beneficiaries who are already enrolled in a Medicare Advantage plan. A separate MA OEP opportunity also applies to certain beneficiaries who are new to Medicare and initially enroll in Medicare Advantage.
Medicare states that a beneficiary can make one change during the Medicare Advantage Open Enrollment Period.
A Medicare Advantage OEP change generally takes effect on the first day of the month after the plan receives the enrollment request.
No. The annual MA OEP does not allow someone in Original Medicare to use that enrollment period to join Medicare Advantage. Another valid enrollment opportunity would be required.
Yes. An eligible Medicare Advantage enrollee can use MA OEP to return to Original Medicare and, when applicable, enroll in a stand-alone Medicare drug plan.
Agents need to be cautious. Federal regulations prohibit knowingly targeting or sending unsolicited OEP marketing to MA enrollees and prohibit certain activities designed to turn OEP into another sales opportunity. Beneficiary-requested interactions and certain educational communications are treated differently.
For independent Medicare agents, the strongest OEP strategy is not aggressive outreach. It is preparation, responsiveness, accurate plan review, and compliant client service.
Know the enrollment rules. Keep current plan information available. Understand the marketing restrictions. Build a consistent process for reviewing client concerns before recommending a change.
Agents who want additional support with Medicare products, contracting, training, compliance guidance, enrollment technology, and marketing resources can explore PSM’s Medicare solutions for independent agents.
For agent use only. This article provides general educational information and is not legal advice. Medicare requirements, carrier procedures, plan availability, benefits, and compliance guidance can change. Agents should verify current requirements with CMS, applicable carriers, state regulators, and their compliance resources before acting.