The New York Times has put out an interactive map which highlights the subway stations that are difficult to access for disabled New Yorkers.
According to the Times, there are 550,000 people in NYC who are disabled and some of them have limited access to the subway. For example, in Co-op City there are 3,500 residents who have trouble walking and live an hour away from a station.
In September residents of the area near the Mosholu subway station petitioned the MTA for wheelchair access to that station particulary because of its proximity to Montefiore Medical Center.
The Times article indicates that Claremont Village is also inaccesible for parents who use strollers because many of them are not near stations with elevators.