New York · Medicare and Medicaid
D-SNPs and New York “default enrollment” letters, in plain English
If you have Medicare and Medicaid, or Medicare is about to start while you are on a Medicaid plan, New York may mail you a letter about a Dual Special Needs Plan (D-SNP). This site explains what the letter says, what you can do, and who to call for free.
- Free to use
- No plan sales
- Not the government
HIICAP is New York’s free Medicare counseling program. Counselors do not sell plans. Mon–Fri, 8:30 a.m.–5:00 p.m.

The letter, in one line
It usually arrives about 60 days before Medicare starts. You can stay in the plan or opt out before the start date.
Start here
Which one sounds like you?
I have both Medicare and Medicaid
Start with what a D-SNP is and why plans keep mailing you.
What a D-SNP isI got a letter about a new plan
Find the two dates, the plan names, and how to opt out if you want to.
Read the letter decoderMedicare starts soon and I am on a Medicaid plan
What usually happens in the months before Medicare begins, and what to watch for.
See the timelineI help a parent or relative with this
A calm one-week plan for the days after a letter arrives.
The first 7 days
The short version
How a “default enrollment” letter works
Three things to know before you make any call. The full checklist is in the letter decoder.
- 1
The letter comes early
Your Medicaid plan sends it about 60 days before your Medicare starts. It names the Medicare D-SNP you would join. Both plans are from the same company. - 2
You have a choice
Do nothing and you join the D-SNP on the start date. Opt out before then and you keep Original Medicare or pick another plan. Each path has tradeoffs for your Medicaid coverage. - 3
Free counselors can compare for you
HIICAP can check whether your doctors and prescriptions are covered by the D-SNP. New York Medicaid Choice can explain what happens to your Medicaid plan if you opt out.
Help where you live
Your borough, your county name, your nearest free counselor
The rules are the same across New York. The practical parts change by borough: which county goes on the form, where HIICAP counselors sit, and the mistakes neighbors tend to make.
Longer reads
Guides for the week after a letter arrives

September 10, 2026 · 8 min read
Moving between boroughs with a D-SNP: SEPs and what changes
Inside New York City a move usually keeps you in the plan’s service area. Here is what still has to change, and the SEPs you may have anyway.

September 10, 2026 · 8 min read
IB-Dual / Integrated Benefits: what the letter is really saying
Translate the official phrases: “aligned,” “remain in your plan,” “opt out,” “fee-for-service.” What each one means for you.

September 10, 2026 · 8 min read
D-SNP vs. MAP in New York: plain-English differences
Same company, same D-SNP, two different Medicaid products underneath. The 120-day line that separates them.
Official public resources (not affiliated)
Where the official answers live
Every fact on this site comes from these government programs. We link to them. They do not endorse this site, and this site is not the government.
Medicare.govThe official U.S. government Medicare siteVisit site
- NY State of HealthNew York’s official health plan marketplaceVisit site
NYS Department of Health (Medicaid)New York State Medicaid program pagesVisit site
- HIICAP (NYS Office for the Aging)Free, unbiased Medicare counseling, 1-800-701-0501Visit site
- NY ConnectsLong-term services and supports information, 1-800-342-9871Visit site
- NYC.gov (HRA and NYC Aging)Medicaid in the five boroughs and NYC AgingVisit site
- EPIC (NYS DOH)Elderly Pharmaceutical Insurance Coverage, 1-800-332-3742Visit site
This site does not enroll you in any plan and is not a government agency. Want free, unbiased help from a person?
HIICAP, New York’s free Medicare counseling program. Free, unbiased, and they do not sell plans. Mon–Fri, 8:30 a.m.–5:00 p.m.



