Very seldom does ODD stand alone. It is more a behavior than the disorder itself. All the kids here have ODD behavior, but it stems from other things--ADHD, bipolar, autistic spectrum disorder. I have a few questions.
1/ What type of professional diagnosed him? I'm guessing a Psycologist because a neuropsychologist or Psychiatrist (with the MD) rarely diagnose stand alone ODD.
2/ Any psychiatric issues or substance abuse on the family tree? Much of this can be hereditary. You need to take both sides of the family into consideration.
3/Any speech or developmental delays?
4/How are his social skills and eye contact?
Others will come along. My opinion is to re-evaluate him with either a Child Psychiatrist or neuropsychologist or both. That's what we had to do (both) to get the real answer to our questions. Welcome!