The southbound train struck the victim who was standing on the platform about 10 a.m., the spokesman said.
The victim was taken to St. Luke's-Roosevelt Hospital Center with minor injuries, an FDNY spokesman said.
The circumstances of the incident were not immediately clear.
Southbound 2 trains will run along the 5 line between 149th Street and Nevins Street, according to the MTA website. In addition, 3 trains are suspended between 148th Street and 96th Street.