Oh, for some reason I assumed that you had 'a source' pointing you in the right direction (I hope that doesn't sound snarky)......maybe it was a general impression because you specifically asked about SSI.

Are you sure he would be on SSI (for the disabled and low income) ? Or should it be SSDI (permanently disabled before age 18, collect under a parent's work record) ?

I don't know the answer on that.......I'm just a disabled person collecting SSDI, not one of our resident experts.......but I would have thought he would be on SSDI for now......and then maybe eligible for section 8 housing or SSI (if his SSDI was low enough) once he moved out.

Have you called SSA's 1 800 # yet ?