Stay in the D-SNP or opt out? A decision guide for New York default enrollment

The letter makes it sound like a yes-or-no question: take the D-SNP or don’t. It is really a choice between three setups, and the right one depends on your doctors, your home care, your prescriptions, and how much you value having one company handle everything. This guide walks through the questions in order. It does not tell you what to pick. It tells you what each answer changes.

The three real options

1. Stay: aligned D-SNP plus your current Medicaid plan. The state calls this IB-Dual. If your letter is the long-term-services version, it is the D-SNP plus a Medicaid Advantage Plus (MAP) plan instead. One company, one card for most things.
2. Opt out to Original Medicare plus a drug plan, with Medicaid fee-for-service. The state says opting out means “you will be disenrolled to Medicaid fee-for-service.” Medicare pays first with any provider who takes Medicare. Medicaid pays after, with any provider who takes Medicaid.
3. Opt out to a different Medicare Advantage plan, with Medicaid fee-for-service. The state’s guide calls this “unaligned.” You get that plan’s network and extras, but not IB-Dual or MAP.

The state is clear that no path is required: “joining a D-SNP is not required, but still an option. Other options include other Medicare Advantage plans or Medicare Fee For Service.”

Question 1: Which letter did you get?

The standard letter says you stay in your Medicaid managed care plan or HARP. The long-term-services letter says you move into a MAP plan. If you got the second one, the state has already decided you need 120 days or more of long-term care, and the choice is different: MAP versus Original Medicare plus a separate Managed Long Term Care plan. Read D-SNP vs. MAP first, then come back.

Question 2: Are your doctors in the D-SNP’s Medicare network?

This is the biggest practical difference. Medicare.gov says Original Medicare lets you “use any doctor or hospital that takes Medicare, anywhere in the U.S.” and usually needs no referral. A Medicare Advantage plan, including a D-SNP, may require its network, referrals, and prior authorization. The state adds that with an integrated plan “you must use the plan’s network of doctors, although your existing doctor(s) may agree to participate with the plan.”

Check your primary care doctor, your most important specialist, and your hospital against the D-SNP’s Medicare directory. If all three are in, this question is neutral. If one is out, ask that office whether they would join. If they will not, weigh how much that doctor matters against everything below.

Question 3: What would you pay in each setup?

Less than people fear, either way. With full Medicaid you are almost always a Qualified Medicare Beneficiary (QMB). CMS says federal law “prohibits all Original Medicare and MA providers and suppliers (not only those that accept Medicaid) from billing QMBs for Part A and Part B cost sharing.” New York’s own page says QMB members “cannot be charged Medicare co-pays.” The IB-Dual member handbook says your cost sharing for Medicare-covered services “will be $0.”

So the medicare.gov line about Medicare Advantage having a yearly out-of-pocket limit and Original Medicare not having one does not change much for you. Where the setups differ in practice is access, not price: a doctor who takes Medicare but not Medicaid still cannot bill you as a QMB, but some offices are less willing to see QMB patients because Medicaid may pay them little or nothing on top. Ask the office before you count on it.

Question 4: Do you get home care now, or expect to soon?

IB-Dual is for people who do not need more than 120 days of community-based long-term services. If you cross that line while in IB-Dual, the state says it “will take steps to transition you to Managed Long Term Care (MLTC) if you are determined mandatory for that program.” Under Medicaid fee-for-service, the same rule applies: the state’s MLTC page says enrollment is mandatory for duals 21 and older receiving community-based long-term services for more than 120 days who meet the minimum needs requirement.

The difference is who coordinates. In a MAP plan, one company runs your Medicare and your home care. With Original Medicare plus an MLTC plan, two organizations do. Neither is wrong. If you already have aides, ask your current plan and New York Medicaid Choice’s long-term care line what changes on the effective date in each setup, and whether your hours are reassessed.

Question 5: Are you in a HARP?

If yes, opting out ends the HARP, and the Office of Mental Health says the services that only exist inside Medicaid managed care, BH HCBS and CORE, end with it. That is a large weight on the “stay” side for many people. Read our HARP post before deciding.

Question 6: Your prescriptions

Every D-SNP includes Part D drug coverage. If you opt out, you need a stand-alone drug plan. Because you have Medicaid, Medicare.gov says you get Extra Help automatically, and the state’s handbook notes that if you do not pick a plan “the federal government will enroll you in Original Medicare... and in a Prescription Drug Plan.” Either way, check whether each drug is on the plan’s list. Any new plan must give you a temporary fill of a drug that is not on its list during your first 90 days, so you have time to sort it out.

Question 7: Extras that only exist on one side

Since January 1, 2025, New York requires D-SNPs to offer dental as a supplemental benefit, and many add transportation, meals, or an over-the-counter card. Original Medicare does not have those. Medicaid has its own dental coverage separate from the D-SNP’s, so ask HIICAP or Medicaid Choice what you would actually lose. On the other side, Original Medicare has no referrals and no prior authorization for most care. Decide which of those you would use.

Question 8: Can you change your mind?

Yes, in both directions, but not symmetrically.

• If you stay and regret it: IB-Dual has no lock-in. Under federal rules since 2025, people with Medicaid can move to Original Medicare plus a drug plan once a month, effective the first of the next month. Doing that ends the IB-Dual arrangement and moves your Medicaid to fee-for-service.
• If you opt out and regret it: people with full Medicaid can use a monthly Special Enrollment Period to join an integrated D-SNP aligned with their Medicaid plan. But once you are in fee-for-service, you no longer have a Medicaid plan to align with. The state says you “may still have an opportunity” to enroll and return to your Medicaid plan, through a pathway that depends on the plan. Ask Medicaid Choice whether your plan offers it before you count on it.

Everyone also has the fall enrollment period (October 15 to December 7) and the Medicare Advantage open enrollment period (January 1 to March 31).

Putting it together

This table describes tendencies, not rules, and it is not a recommendation for you. A HIICAP counselor can run your actual doctors and drugs through both setups for free.

What to write down before you call

• Which letter you got (standard or long-term services) and the effective date.
• Your three most important providers and whether each is in the D-SNP’s Medicare network.
• Your drugs and whether any need prior authorization on the D-SNP’s list.
• Whether you have home care hours or a HARP care manager today.
• The one thing you would be most upset to lose.

Then use the phone scripts to ask each line the right question.

Sources

Medicare.gov, “Compare Original Medicare & Medicare Advantage,” Special Needs Plans, Extra Help, and enrollment period pages; CMS, Qualified Medicare Beneficiary program page (March 2026) and MLN7936176 (September 2025); CMS dual and Extra Help SEP job aid (effective January 1, 2025); CMS Part D Benefits Manual ch. 6; New York State Department of Health, “Integrated Care Plans for Dual Eligible New Yorkers” (revised July 2026), Medicare Savings Program page, MLTC partial capitation page (revised April 2026), IB-Dual Model Member Handbook, IB-Dual Enrollment Guide v1.0 (February 2026), and Medicaid managed care exclusions chart; 42 CFR 422.66(c). Start at health.ny.gov and Medicare.gov, or call HIICAP at 1-800-701-0501. Your letter controls.