Lower East Side: D-SNPs, IB-Dual, and the “default enrollment” letter

The Lower East Side, from the Grand Street co-op towers to the tenements and NYCHA developments of Alphabet City, has one of the oldest populations in lower Manhattan. Many residents have been in the same apartment for decades, have had Medicaid for years, and are now getting a letter from their Medicaid plan about being enrolled in its Medicare D-SNP. Others want to understand IB-Dual and MAP.

This page is for those residents and for the adult children, co-op neighbors, settlement house staff, and home attendants who help them. It explains what the letter asks, what happens if you do nothing or opt out, and which free counselors are a short walk away. It does not enroll anyone.

For Medicare and Medicaid records the Lower East Side is in New York County, and Medicaid is administered citywide by the NYC Human Resources Administration (HRA), not a county office. ZIP 10002 covers most of the neighborhood south of Houston Street and shares its western blocks with Chinatown; 10009 covers Alphabet City. Both are approximate. Write “New York” when a form asks for county.

Every New York City integrated dual plan on the state’s 2026 IB-Dual chart lists New York County, so the plan on a Lower East Side letter covers the neighborhood. The network question here is specific: NYC Health + Hospitals / Gouverneur on Madison Street is a public health center many residents use for primary care, and NYC Health + Hospitals / Bellevue on First Avenue at 27th Street is the nearest public hospital. Check both in any D-SNP’s directory, along with your Grand Street or Avenue B pharmacy.

The F at Delancey Street and East Broadway and the J/M/Z at Essex Street put the neighborhood a couple of stops from lower Manhattan, and two in-person HIICAP sites are close by.

Lower East Side co-ops along Grand Street have busy mail rooms, and a default enrollment notice looks like every other plan mailing. If your Medicaid plan also runs a D-SNP, expect the notice at least 60 days before your Medicare start date, sent by the plan. Look for the effective date and the opt-out deadline, generally the day before; confirm on the letter. Not every plan sends one.

The local check is Gouverneur. Many residents get primary care there, and the health center’s participation with a company’s Medicaid plan does not mean it is in that company’s D-SNP. Ask the Eldridge Street counselor or HIICAP to look up Gouverneur, Bellevue, and your pharmacy in the D-SNP directory before the effective date.