Do I need to take my son to a neurologist ?

  My son has been diagnosed with mild-moderate PDD. He has signifigant motor problems, moderate speech problems, and a normal intelligence, according to standardized tests and observations.  He is 3 years old, and has been receiving OT and speech therapy for about a year now, and he has made progress. He has also been under the care of a respected pediatrician. This pediatrician has other PDD children.
  Recently, I took him to be tested at the public school, and they saw his motor difficulties and suggested a nerologist. Neither my child's doctor, or any of the therapists had ever suggested this before.
  Is this something I should do?  Why? Why not? Is there any possiblity that a diagnosis from a neurologist could help him, or would I just be subjecting him to uncomfortable tests? If the nuerologist did find a physical problem,  but we were already getting OT and speech therapy, etc, would that really help us to have that label on him? Are there any treatable diseases that might mimic mild PDD?
  Thank-you.
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Dear Marilyn:
The main purpose from seeing a Neurologist (Pediatric Neurologist) is to make sure that your son does not have a progressive neurological condition that can lead to worsening of his problems.
It is always recommended that patients with fine motor movements problems, delayed speech ... be seen by a specialist at least once in order to make sure that there is no condition that may make their problems dteriorate.
I hope I was able to help you
Good luck