Thank you both. We are going to see a psychologist today who, himself, is ADHD and it wasn't discovered until he was in college. He has a Dr. who he works with who can prescribe my son meds.
The issue is exacerbated by the fact that his dad is (no kidding) a sociopath. If he were to be DXd himself, he would likely fall under Narcissist Personality Disorder and he's also passive aggressive. He's a bully. I left the marriage because of it. He believes I caused the problems my son is having because he 'wasn't that way when I was around.' Etc. Yes, my ex's side of the family at large does not know, and despite sending my ex numerous articles and links; he does not want to know. My son has always been dismissed as being lazy, not paying attention, not trying hard enough. It took years to get him classified with a LD for school. I know my son didn't wake up in June with ADHD. My ex is just an evil person who will never accept my son for who he is. It breaks my heart.
However, lately, my son's outbursts have been worse. Last week he lost it when I told him it was time to get off his cell phone. I gave him ten minutes to wrap up the conversation and then a final option to behave. Either he could say good-by himself, or I could go online and simply shut down the phone. In the end, I had to go on line. He lost it, demanded I turn his phone back on and called me an F-ing bit*h. He said I wasn't his mom anymore.

My daughter happened to record the meltdown on audio. I saw the therapist myself, alone, yesterday and played it for him. I wanted to go alone first to explain the family dynamics and learn how to be a better parent to my son.
As a result of his behavior, I took away his xbox for one week, and until he recognized his behavior was inappropriate and hurtful. However, I know these incidences will again occur (although that was the worst meltdown he's ever had. He's never gone after me like that). He can be so sweet and loving but when he doesn't get his way he loses it. He also is not accountable for his own behavior. I just think, if I die tomorrow, where will my son land? His dad is not a father and there is no emotional connection. My son is needs to learn how to work through his anger (much of it warranted because of the divorce, exacerbated by his ADHD. ) Gotta run. Thanks for letting me rant.