ADD isn't a diagnosis anymore. It's the same spectrum disorder. I think in ICD-10 it's coded as ADHD-PI and ADHD-PH.

What's crazy is that it's also what prevented me from getting diagnosed as my "hyperactive" episodes happened at times that were largely appropriate, after school, play grounds, car rides. I wouldn't run around bouncing off walls, but I would talk about stuff until people walked away wide-eyed.

I was a stupid smart kid too. Just annoying as fuck.