HEMS in New York City  

Any inter-facilties done go to either the west 30th, east 34th or wall street helipad

Since they are in a city, there is no need for helicopter for EMS (unless they are medevacing someone out of the city for an interfacility)

NYPD handles all rescue

On Long island, some police units do medevac

In New Jersey, Hacknsack in in the north, Atlantic Air 3 at Mountain Creek/Vernon, Atlantic Air 1 in Netcong New Jersey. They will sometimes do interfacilities to the west 30th heliport for specialized procedures, mostly heart. They will also go to Jacobi (i think on the Bronx) for the hyperbaric chamber.

On rare occasion, they can setup an LZ in central park, but it's mostly just as easy to use one of the helipads. 

Hope this helps and feel free to write if you have any other questions