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Use the correct election period

D-SNP Enrollment Periods and the Dual/LIS Special Enrollment Rules

Having Medicaid or Extra Help does not create one unlimited monthly Medicare Advantage switching right. The Dual/LIS SEP and Integrated Care SEP allow different actions for different groups.

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Calendar and Medicare coverage cards representing D-SNP special enrollment periods
Written and reviewed by , licensed Medicare brokerLast reviewed
The important correction

The old “dual members can change plans every month” explanation is incomplete

This guide answers when and how a D-SNP enrollment or coverage change may be allowed. For the definition, eligibility categories, benefits and Medicare-Medicaid coordination, start with What Is a D-SNP?

Dual/LIS SEP

Allows a dual-eligible or LIS-only person to elect a standalone Part D plan in any month. It can also support returning from Medicare Advantage to Original Medicare with a standalone PDP. This SEP is not available while the individual is identified as a potential at-risk beneficiary or at-risk beneficiary under a Part D drug management program.

Integrated Care SEP

Allows a qualifying full-benefit dual member to enroll in an eligible integrated D-SNP in any month when the enrollment aligns Medicare and Medicaid coverage as required.

Neither SEP is a blanket monthly pass to move into any ordinary Medicare Advantage plan or freely switch among non-integrated MA plans.

What each current SEP permits

Enrollment right Who may qualify What it can do What it cannot do
Dual/LIS SEP People with Medicaid or Part D Extra Help Elect or switch standalone PDP coverage in any month; can accompany a return to Original Medicare Does not permit monthly enrollment into any Medicare Advantage plan; it is also unavailable while the individual is identified as a potential at-risk or at-risk beneficiary under a Part D drug management program
Integrated Care SEP Qualifying full-benefit dual members Enroll in an eligible integrated D-SNP in any month when alignment requirements are met Does not apply to every D-SNP or every partial-benefit category
Part D drug-management exception: The monthly Dual/LIS SEP is not available while Medicare identifies the beneficiary as a potential at-risk or at-risk beneficiary under a Part D drug management program. The Part D plan sends written notice when this designation applies. This restriction is specific to the Dual/LIS SEP and does not by itself eliminate every other Medicare enrollment period that may be available.

Other enrollment periods may still apply

D-SNP election rights sit inside the broader Medicare enrollment system. Use the Medicare Enrollment Periods hub for the complete map and the general Special Enrollment Period guide for moving, employer, plan-ending and other life-event rules.

Initial enrollment

A person first eligible for Medicare may choose coverage during the applicable Initial Enrollment Period.

Annual Enrollment Period

From October 15 through December 7, eligible beneficiaries can generally join, change or leave Medicare Advantage or Part D coverage for January 1. Review the Annual Enrollment Period guide.

Medicare Advantage OEP

From January 1 through March 31, a person already in Medicare Advantage generally has one opportunity to switch MA plans or return to Original Medicare. Review the Medicare Advantage OEP guide.

Event-specific SEPs

Moving, losing Medicaid, gaining Medicaid, a plan termination or another qualifying event can create a separate SEP with its own dates and allowed actions.

Five checks before using a D-SNP SEP

  1. Confirm current Medicaid status. Full-benefit, QMB-only, SLMB-only and other categories do not produce identical plan eligibility.
  2. Name the action. Joining an integrated D-SNP, switching a PDP and returning to Original Medicare are different transactions.
  3. Verify the exact D-SNP. CMS publishes an annual list of integrated D-SNPs eligible to receive enrollment under the Integrated Care SEP.
  4. Check alignment. The Medicare D-SNP and Medicaid managed-care enrollment may need to be affiliated or otherwise aligned.
  5. Coordinate medical and drug coverage. Avoid an unintended gap, duplicate drug coverage or automatic disenrollment from incompatible coverage.

Why plan comparison still comes before enrollment

An SEP answers whether Medicare permits a change; it does not answer whether the new plan is a good fit. Confirm provider networks, hospitals, prescriptions, pharmacies, prior authorization, Medicaid coordination and supplemental-benefit restrictions.

Use the D-SNP comparison checklist before submitting the application.

Common questions

D-SNP enrollment FAQ

Can every dual-eligible person switch D-SNPs monthly?

No. A monthly Integrated Care SEP may allow a qualifying full-benefit dual member to join an eligible integrated D-SNP when alignment rules are met. Other changes require another valid enrollment period.

What does the Dual/LIS SEP allow?

It allows a person with Medicaid or Extra Help to elect a standalone Part D plan in any month. It may be used when returning from Medicare Advantage to Original Medicare with PDP coverage. The SEP is not available while the person is identified as a potential at-risk or at-risk beneficiary under a Part D drug management program.

Can the Dual/LIS SEP enroll someone in an ordinary Medicare Advantage plan?

No. CMS replaced the old quarterly rule with a monthly SEP focused on standalone Part D elections.

When is the monthly Dual/LIS SEP unavailable?

The monthly Dual/LIS SEP is not available while a person is identified as a potential at-risk beneficiary or at-risk beneficiary under a Part D drug management program. The plan sends written notice when this designation applies. Other enrollment periods may still be available depending on the situation.

When does coverage usually begin?

For many SEP elections, coverage begins the first day of the month after the plan receives the valid request. Confirm the effective date before ending or relying on other coverage.

Does losing Medicaid create a different SEP?

It can. Loss of special-needs status and loss of Medicaid or Extra Help can create separate enrollment rights. The timing depends on the notice and the individual situation.

Medicare and Medicaid Series

Hub guideMedicare and Medicaid in MissouriD-SNP guideWhat Is a D-SNP?Cost assistanceMedicare Savings ProgramsBilling protectionQMB Billing ProtectionEligibility levelsFull vs. Partial Dual EligibilityPrescription helpExtra Help, Medicaid and MSPs
Enrollment guide · You are hereD-SNP Enrollment Periods
Missouri MedicaidMissouri Medicaid Spend DownPlan comparisonHow to Compare D-SNPsCoverage transitionWhat Happens If You Lose Medicaid?Illinois guideMedicare and Medicaid in Illinois

More Medicare guidance

Related Articles

Related articleGeneral Medicare Special Enrollment PeriodsRelated articleMedicare Enrollment Periods HubRelated articleAnnual Enrollment Period guideRelated articleMedicare Advantage OEP guide

Independent Medicare guidance

Use the right SEP for the right coverage change

Benjamin Thompson can help identify the requested change, review available plans and coordinate the medical and prescription pieces before an enrollment is submitted.

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This article provides general educational information and does not determine Medicaid, Medicare Savings Program, Extra Help or D-SNP eligibility. Program rules, limits, benefits, networks, formularies and enrollment rights can change. Verify the exact person’s status with Medicare, the applicable state Medicaid agency and the plan before changing coverage. Thompson Medicare Brokerage is not connected with or endorsed by the U.S. government or the federal Medicare program.