Best possible in-home ABA services available with Blue Cross Blue shield HMO in Illinois?

Hello.. I am a desperate mother looking for good ABA in-home therapy. I have Blue Advantage HMO, and I really do not know which ABA service providers in Illinois are really good ones who will also accept my insurance. I have had a real bad experience with my child's current in-home ABA program, as this provider does not have well-trained therapists. If anyone knows about good ABA providers in northwest suburbs of Chicago, Illinois, please let me know.