A Medicare Special Enrollment Period (SEP) lets a person join, switch or drop a Medicare Advantage or drug plan outside the annual windows after a qualifying event, such as moving, losing other coverage, a change in Medicaid or Extra Help, or a plan leaving. The plan confirms eligibility; you ask, record the reason and capture the event date.
What is a Medicare SEP, and why does it matter on an inbound call?
A Special Enrollment Period is a window that opens after a specific event and lets a person with Medicare change plans outside the two annual periods. The fall Annual Enrollment Period (AEP) runs October 15 to December 7, and the Medicare Advantage Open Enrollment Period runs January 1 to March 31 for people already in a Medicare Advantage plan. At any other time, an enrollment request needs a valid election period, and 42 CFR 422.62(b) lists the Medicare Advantage SEPs: a move, lost employer coverage, a plan that ends its contract, a 5-star plan and a declared disaster, among others. The plan, not the agent, decides which election period applies. CMS enrollment guidance says the plan must generally accept the person's verbal or written statement of the facts that make them eligible, and that it may ask for an attestation but may not request or require evidence. Coverage usually starts on the first of the month after the plan receives the request.
On an inbound call outside AEP, that makes the election period the first thing to settle, before you compare plans the caller may not be able to join yet. A caller who does not qualify today may qualify after a move or a coverage change, or may simply need the next AEP. Keep the SEP glossary entry handy for newer agents, and see Medicare Advantage calls for how these calls are bought.
Which SEPs do agents hear most on inbound calls?
Most SEP callers describe one of a handful of life events. The table pairs each with its window and its rule, using the wording on Medicare.gov and in the regulation.
| What the caller says | Window | What they can do | Rule |
|---|---|---|---|
| I moved | Starts the month of the move (or the month before, if they told the plan first) and runs 2 full months after | Join or switch a Medicare Advantage or drug plan, or return to Original Medicare | 422.62(b)(2) |
| My job coverage is ending | Ends 2 months after the month employer or union coverage, including COBRA, ends | Join a Medicare Advantage or drug plan | 422.62(b)(4) |
| I lost my drug coverage | Ends 2 months after the later of the loss or the notice, if the loss was involuntary | Join a Medicare Advantage plan with drug coverage or a drug plan | 422.62(b)(19) |
| I have Medicaid or Extra Help | Once a month, effective the first of the next month | Join or switch a standalone drug plan; full-benefit dual eligibles can also join an integrated D-SNP | 423.38(c)(4) and (c)(35) |
| My Medicaid or Extra Help changed | Within 3 months of the change or the notice, whichever is later | One election | 423.38(c)(9) |
| I'm moving into or out of a nursing home | While living there and 2 full months after leaving | Join, switch or drop a plan | 422.62(a)(4) |
| My plan is leaving or not renewing | For a non-renewal, December 8 to the last day of February | Switch plans, or fall back to Original Medicare | 422.62(b)(1) |
| There's a 5-star plan near me | Once, from December 8 before the plan year through November 30 | Join a plan CMS scores at 5 stars overall | 422.62(b)(15) |
| I joined Medicare Advantage at 65 and want out | 12 months from the plan's start date | Return to Original Medicare | 422.62(c) |
Which SEPs need CMS approval before anyone can use them?
Four SEPs cannot go on an agent-submitted application until CMS approves them. In its Contract Year 2027 final rule, published April 6, 2026 and effective June 1, 2026, CMS codified its long-standing practice: these elections need prior CMS approval, given either through a CMS-operated mechanism such as 1-800-MEDICARE or through a notice the person receives.
- Contract violation: the plan or its agent materially misrepresented the plan, or failed to provide needed services. The person must show this to CMS.
- Sanction: the person's plan is under a CMS sanction, and they need the notice that the sanction triggers.
- Not told about losing creditable drug coverage: CMS decides case by case.
- Other exceptional conditions: the catch-all, also decided by CMS.
If a caller says a previous agent misled them, the honest path is 1-800-MEDICARE, not a box on your application. A second trap involves Extra Help. Under a rule CMS finalized in April 2024, the monthly SEP for people with Extra Help covers standalone drug plans only, and CMS guidance says it does not permit enrollment into Medicare Advantage plans with drug coverage or changes between them. Full-benefit dual eligibles have a separate monthly SEP into integrated D-SNPs.
How do you verify SEP eligibility on the call?
You verify by asking, matching and recording; the plan makes the final determination. Work through the same order on every call so nothing is skipped when the line is busy.
- 01Confirm Parts A and BMedicare Advantage requires both. Ask which parts the caller has and the date each one started.
- 02Ask what changed, in their wordsOpen questions beat a list of SEP names: did you move, did other coverage end, did a letter arrive from Medicaid, Social Security or your plan?
- 03Get the dateMost windows count from an event date: the move, the last day of employer coverage, the date on a notice. CMS guidance notes that some periods require the plan to obtain that date.
- 04Match one SEP and count the monthsA window that runs 2 full months after a March move closes May 31. If the count lands in the past, the SEP has closed.
- 05Check once-only limitsThe 5-star SEP works once per plan year, and the Open Enrollment Period allows one change. Ask whether the caller already changed plans this year.
- 06Record the attestation, not proofRead the plan's election period statement, have the caller confirm it on the recording and mark the matching reason. Do not make documents a condition of enrolling.
- 07If nothing fits, say soTell the caller when the next window opens and ask whether you may call back then. A call is not unsolicited when the beneficiary consents to it, under 42 CFR 422.2264(a)(3).
Worked example: does this caller have an SEP?
Three callers on the same day show how the date math works. Each one has Parts A and B and lives in the new plan's service area.
- Caller one moved from Ohio to Florida on March 10, out of her plan's service area, and calls on April 20. Her SEP began in March and runs 2 full months after the move month, so it closes May 31. If her new plan receives the request in April, coverage generally starts May 1.
- Caller two's employer coverage ends June 30. His SEP closes 2 months after that month, on August 31. Applying in June, he can choose an effective date of July 1, August 1 or September 1, because the rule allows the first of the next month up to 3 months out.
- Caller three gets Extra Help, is in a Medicare Advantage plan with drug coverage and wants a different one in May. The monthly Extra Help SEP does not allow that change. Unless another SEP applies, her next opportunity is AEP, starting October 15, for coverage on January 1.
In each case, write the event date and the SEP reason exactly as the caller stated them. The plan turns them into an election type of S and an SEP reason code it sends to CMS, using the codes in CMS's Plan Communications User Guide.
What should you document on an SEP call?
Document enough that someone reviewing the file later can see why the enrollment was valid and what the caller agreed to. Use this checklist.
- The full call recording. Plans must require third-party marketing organizations, which include independent agents, to record all marketing and sales calls in their entirety and keep them for 6 years (42 CFR 422.2274(g)).
- The scope of appointment, recorded before you discuss plans. See the scope of appointment guide.
- The TPMO disclaimer, read before any benefits are discussed. See TPMO disclaimer requirements.
- The SEP reason and the event date, in the caller's words.
- The caller's confirmation of the plan's election period statement.
- The confirmation number the plan's enrollment process gives you.
- Any follow-up the caller agreed to, with the date.
What mistakes do agents make with SEPs?
- Treating the Extra Help monthly SEP as permission to switch Medicare Advantage plans.
- Offering the Open Enrollment Period to a caller in Original Medicare. It only covers people already enrolled in Medicare Advantage.
- Promising an effective date before the plan confirms the election period.
- Marking a CMS-approval SEP, such as a contract violation, on an agent-submitted application.
- Asking the caller to send proof before you will enroll them.
- Describing plan benefits before the TPMO disclaimer and the scope of appointment.
If you buy inbound Medicare calls outside AEP, ask about the election period early. On Callmart, billing depends on connected time reaching the buffer you chose, so the eligibility check belongs at the start of your call. How much Medicare calls cost and getting Medicare clients after AEP cover the buying side.
Common questions
01What are the most common Medicare SEPs?
The ones agents hear most on inbound calls involve a move out of the plan's area, the end of employer or union coverage, an involuntary loss of drug coverage, a change in Medicaid or Extra Help, moving into or out of a nursing home, and a plan that is leaving or not renewing. Medicare.gov lists each one with its window.
02What is the 5-star SEP?
It lets a person enroll in a Medicare Advantage or drug plan that CMS scores at 5 stars overall, once per plan year, from December 8 before the plan year through November 30. The person must still meet the plan's other conditions, such as living in its service area.
03Which SEP applies to dual eligibles?
People with Extra Help can make one election a month into a standalone drug plan. Full-benefit dual eligibles can also make one election a month into an integrated D-SNP (a FIDE SNP, HIDE SNP or applicable integrated plan). A change in Medicaid or Extra Help status opens a separate election within 3 months.
04Can agents enroll someone in an SEP over the phone?
Yes, on an inbound call, using the plan's CMS-approved telephonic enrollment script. CMS guidance says the applicant must be told they are completing an enrollment request, agree to be recorded, verbally attest to their intent to enroll and receive a confirmation number. The plan still decides SEP eligibility.
05What are SEP codes?
They are reason codes plans send to CMS with an election type of S, listed in CMS's MA and Part D Plan Communications User Guide. Agents rarely enter them directly. Your job is to capture the right reason and event date so the plan can code the election correctly.