Can you be a Buddhist if you don't believe in reincarnation? Can I still consider myself a "Buddhist" if I don't believe in reincarnation??
I think to call yourself a Buddhist or practice the buddhist teaching you should at least believe in cause and effect.Maybe not in past lives but in the here and now.When you can see cause and effect clearly in the present then you'll infer that the same principle applies after death. 

Things you do  in this life will have some effect after.(Future rebirth)

There must be something you did before that caused you to be here now in this life.(Past Birth)

Note: Rebirth is not the same as reincarnation.Please search this site for more info.