If you have both Medicare and Medicaid, you have probably gotten mail (or a phone call) pitching a plan with a $0 premium, a grocery card and free dental work. That is almost always a D-SNP, and the pitch is not a scam, but it is also not the whole story.
A D-SNP is a real, federally regulated type of Medicare Advantage plan, restricted by law to people who qualify for both programs. How much it actually coordinates your care, what it covers beyond Original Medicare, and when you are allowed to switch into or out of one changed again as of 2025 and carried into 2026. This guide covers what a D-SNP is, the three levels of integration, what one costs, and how to compare plans without relying on a sales call.
What Is a D-SNP
A Dual Eligible Special Needs Plan (D-SNP) is a Medicare Advantage plan authorized under the Bipartisan Budget Act of 2018 and sold only to people enrolled in both Medicare and Medicaid, a group commonly called “dual eligibles.” Like any Medicare Advantage plan, a D-SNP replaces Original Medicare (Parts A and B) and typically bundles in Part D drug coverage, but it is built specifically around the needs of low-income people who also have Medicaid.
Every D-SNP is required to have a contract with the state Medicaid agency, called a State Medicaid Agency Contract (SMAC), and to coordinate benefits and share data between the Medicare and Medicaid sides of a member’s coverage. CMS’s own SNP Comprehensive Report for August 2026 counts 6,500,322 people enrolled in 1,082 D-SNPs across 347 parent contracts. That is the large majority of the more than 8 million people enrolled in a Medicare Special Needs Plan of any type as of February 2026, per KFF, which found that Special Needs Plans drove 83% of Medicare Advantage’s enrollment growth over the prior year.
How D-SNPs Work: Three Levels of Integration
Not all D-SNPs are built the same way. CMS sorts them by how tightly the Medicare and Medicaid sides of a member’s coverage are linked.
Coordination-only D-SNP. The plan has no Medicaid managed care contract with the state. It shares data and care-coordination information with whatever Medicaid coverage the member has separately, whether that is a state Medicaid fee-for-service program or a different Medicaid managed care plan entirely. This is the loosest form of integration and, per Medicare.gov, is not eligible for the monthly enrollment window described below.
HIDE SNP (Highly Integrated Dual Eligible SNP). The D-SNP’s parent company also runs an affiliated Medicaid managed care plan that covers long-term services and supports, behavioral health, or both. The Medicare and Medicaid plans do not necessarily have to share the exact same list of enrollees.
FIDE SNP (Fully Integrated Dual Eligible SNP). The most integrated option. It requires “exclusively aligned enrollment,” meaning a member’s Medicare and Medicaid coverage come from the same parent organization, and the plan covers nearly all Medicaid benefits, including long-term care.
The split is uneven. In CMS’s August 2026 report, coordination-only plans hold 3,395,520 enrollees, HIDE SNPs 2,316,408 and FIDE SNPs 788,394, so slightly more than half of all D-SNP members are in the least integrated kind of plan.
CMS also uses a broader regulatory label, “Applicable Integrated Plan” (AIP), that covers FIDE SNPs, HIDE SNPs using exclusively aligned enrollment, and a few other integrated Medicare-Medicaid combinations. AIP status is what actually determines whether a plan qualifies for the monthly switching window covered next.
Who Can Enroll, and When You Can Switch
To join any D-SNP you need Medicare Part A and Part B, you need to live in the plan’s service area, and you need to be eligible for the level of Medicaid the plan requires (some D-SNPs are open only to “full-benefit” duals, others also accept partial-benefit duals or QMB-only enrollees).
The rules for switching plans changed materially for 2025 and remain in effect for 2026. Before 2025, dual eligibles and Extra Help recipients had a quarterly special enrollment period (SEP) that let them change Medicare Advantage or Part D plans once each calendar quarter for the first three quarters of the year. That quarterly SEP is gone.
In its place, Medicare.gov describes two separate monthly windows for 2026:
- A general monthly SEP for anyone with Medicaid or Extra Help. This lets you switch Part D drug plans, or drop a Medicare Advantage plan with drug coverage and return to Original Medicare plus a standalone Part D plan, once a calendar month.
- An Integrated Care SEP, effective January 1, 2025, for full-benefit dual eligibles only. This lets you join or switch into an integrated D-SNP (an AIP, HIDE SNP or FIDE SNP) once a calendar month, provided you are enrolled in, or enrolling in, the Medicaid plan aligned with that D-SNP.
The practical effect: if the D-SNP you want is integrated, you can switch into it almost any month of the year. If it is a coordination-only D-SNP, the monthly window will not get you in; you generally need the Medicare Advantage Open Enrollment Period, the Annual Enrollment Period (October 15 to December 7), or another qualifying life event. Medicare.gov puts it directly: “not all D-SNPs are integrated,” so it is worth confirming a specific plan’s status before counting on being able to switch mid-year. See our guide to dual eligible Medicare and Medicaid coverage for more on how the two programs interact.
What a D-SNP Costs
For most enrollees, a D-SNP costs $0 a month in plan premium. Medicare.gov states plainly that if you have Medicare and Medicaid, “most of the costs will be covered for you,” because your Medicaid coverage, or the Qualified Medicare Beneficiary (QMB) program if you qualify for that instead of full Medicaid, pays Medicare’s premiums, deductibles, copays and coinsurance on your behalf. You still owe the standard Part B premium unless a Medicare Savings Program (see our guide to Medicare Savings Programs) is covering that too.
That said, cost still varies by plan. Medicare.gov notes some SNPs charge a premium in addition to Part B, so a specific D-SNP is not guaranteed to be $0; you have to check the plan’s own summary of benefits on Medicare Plan Finder.
The Supplemental Benefits D-SNPs Advertise
D-SNPs compete heavily on extra, non-Medicare benefits, and this is what most of the mail and phone pitches are about. Commonly advertised extras include:
- An over-the-counter (OTC) allowance for items like vitamins and first-aid supplies
- Dental coverage beyond Medicare’s limited dental benefit
- Vision coverage, often including an annual eye exam and glasses allowance
- Hearing aids and hearing exams
- Non-emergency medical transportation to appointments
- A grocery or flex-spending card, usually tied to a qualifying chronic condition or a Special Supplemental Benefits for the Chronically Ill (SSBCI) designation
Here is the honest caveat: every one of these benefits varies by plan and by county. A D-SNP available in one ZIP code can look completely different from a plan with the same name in a neighboring county, and dollar amounts, provider networks and eligibility rules for each extra benefit change every plan year. The only reliable way to know what a specific plan covers is to read that plan’s Summary of Benefits or Evidence of Coverage, not the advertisement.
D-SNPs vs. Original Medicare and Medigap
| D-SNP | Original Medicare alone | Original Medicare + Medigap | |
|---|---|---|---|
| Who can enroll | Medicare + Medicaid dual eligibles only | Anyone with Medicare | Anyone with Medicare (medical underwriting may apply outside your Medigap open enrollment window) |
| Typical monthly premium | Usually $0 (Medicaid/QMB covers cost sharing) | $0 plan premium, but you owe Part B premium plus deductibles and 20% coinsurance | Part B premium plus a Medigap premium, often $100-$300+/month |
| Extra benefits (dental, vision, hearing, OTC) | Often included, varies by plan/county | Not included | Not included |
| Provider network | Usually limited to an HMO or PPO network | Any provider that accepts Medicare | Any provider that accepts Medicare |
| Care coordination with Medicaid | Required by contract, degree varies by plan type | None built in | None built in |
For a dual eligible, a D-SNP is almost always the cheaper and more coordinated option, because Medicaid already covers Original Medicare’s cost sharing and a Medigap policy duplicates coverage you do not need to pay for. If you are not dual eligible, a D-SNP is not an option for you at all; see our comparisons of Medicare Advantage vs. Original Medicare and Medicare Advantage vs. Medigap instead.
C-SNPs and I-SNPs, Briefly
D-SNPs are the largest of Medicare’s three Special Needs Plan types, but not the only ones. A C-SNP (Chronic Condition SNP) is limited to people with a specific, severe chronic condition on CMS’s approved list, such as diabetes, chronic heart failure, ESRD or certain lung conditions; see our guide to Medicare and ESRD if kidney failure applies to you. An I-SNP (Institutional SNP) is limited to people who live in, or need the level of care provided by, a nursing home or other long-term care institution. Both, like D-SNPs, tailor their provider networks, drug formularies and supplemental benefits to their target population, and both require Part A and Part B eligibility plus meeting the specific condition or setting requirement.
How to Compare Plans
Medicare’s official Plan Finder tool at medicare.gov lets you filter by SNP type, see whether a specific D-SNP is coordination-only or integrated, and compare premiums, drug formularies and supplemental benefits side by side for your ZIP code. Before enrolling, confirm three things directly from the plan’s own materials: whether it is integrated with your specific Medicaid plan, what its actual dollar amounts are for dental, vision, hearing and any grocery or OTC card, and whether your current doctors are in its network. If you are newly navigating dual eligibility, our overview of Medicaid vs. Medicare is a useful starting point, and if you receive SSI, see SSI and Medicaid for how that eligibility connects to Medicare.
Bottom line: a D-SNP is a Medicare Advantage plan built for people who already have both Medicare and Medicaid, usually with a $0 premium and extra benefits Medicaid or QMB is effectively subsidizing. The 2025 rule change means you can switch into an integrated D-SNP almost any month, but coordination-only D-SNPs and non-integrated switches still run on the standard Medicare enrollment calendar, so check a plan’s integration status before you count on being able to change it later in the year.