R.
The DSM-IV states a child must be 7 y/o before a diagnosis of ADD/ADHD can be made. That doesn't mean doctors don't treat it earlier, but they won't formally diagnose it. My son is 5 and his pediatrician suspects he has it and wants to medicate him if the current therapies we're using stop working... but they are working and so no drugs yet. And a psychiatrist would be the one to diagnose it anyhow. So, I would suggest you start there and get a psychiatrist to evaulate her and then they can recommend you to treatment facilities/options/etc such as occupational therapy and/or medicinal treatments.
Best of Luck!