You should also check out the NY Innovative Tech Meetup, which is just getting off the ground next Tuesday, Sep. 17 and will have a big Health tech focus, among other things [1]. It's worth going to -- it's a branch of the big TechBreakfasts that go on in other cities [2]:

[1] http://www.meetup.com/innovative-tech [2] http://www.meetup.com/techbreakfast