A mother of an ASD child recommended this place to me. She said it was great, but I have not personally gone here as of yet.
http://behaviortherapycenter.com
I did try the KKI center in Columbia and did not like it at all. I felt that the psychologist they matched me with was really inexperienced and spent the first 3 sessions I went to talking primarily to me - just giving toys to my child to play with. I just wasn't happy but I dunno... you may get a better person than I did.