This and the list of medals that will be awarded during the paralimipici games in Rio in 2016 by sports.
From this list it is deduced that for some sports we know more disability categories grouped within the same competition (for example Cycling Road - Men's Road Race C1-2-3) for most instead athletes with different types of disability will have separate classifications.
To confirm this I can link the medal table for Men's 1500 metres from London 2012 Summer Paralympics as commented above by Philip Kendall.