My son was diagnosed by a pediatric neurologist. The evaluation process was actually started by the school, informally in kindergarten and formally in first grade, and part of their full scale eval was to have me take him to a ped. neuro. specifically. Some pediatricians will make the diagnosis, while if you're in an area with a greater volume of specialists they may recommend you see and developmental pediatrician, neuropsychologist or neurologist. The neuro we saw had me fill out the Vanderbilt scale and performed several quick reflex exams and performance tests. As far as I know, this was not a very thorough evaluation! LOL He's not my favorite doc, even though he is very highly recommended. So, while a neurologist can give you the diagnosis you need for school, they might not be the best all-around choice for the child's adhd care. I'm trying to get into an amazing developmental pediatrician (who's on maternity leave! ack!), as I think they have more advanced knowledge of special needs than a regular ped (even though we love ours) but will focus on the whole child (unlike the neuro).