About 95% of this discussion, while interesting (and exhaustively covered in previous threads), is completely irrelevant to the OP's original question.
It's about the difference between a noun and an adjective. This is covered in primary school. Unless you're going to decide that ASD can also stand for "Autism Spectrum Disordered", ASD is a noun. Saying someone "is ASD" is grammatically horrible and hurts my spergy little brain.
Incidentally, I'm also bipolar, and I hate it when bipolar is used as a noun e.g. "I have bipolar". No you do not. You are bipolar. Bipolar is an adjective. What you have is bipolar disorder.
I'll make this easy.
A noun is a naming word.
An adjective is a describing word.
I am autistic and bipolar and myopic and overweight.
I have ASD and bipolar disorder and myopia and a big fat arse.
Or, if you like person-first, I am a person with ASD and a person with bipolar disorder and a person with myopia and a person with a big fat arse.
Or if you go mega-euphemistic, I am a person who happens to have ASD and a person who happens to have bipolar disorder and a person who happens to have myopia and a person who happens to have a big fat arse.