Sadly there won't be any difference in their title - NeuroPsychs and 'regular' Psychs are both PhD's. A good place to start is the regions section on this site.

You can also try a Google search - "Neuropsychologist Pittsburgh" and start calling the Dr's who show up in the results.

There's also CTY @ John's Hopkin's in MD - http://cty.jhu.edu/counseling/

~amy