Here are some basic questions that you may ask:
How much do they charge per day/per week/per hour?
Do they do in-house therapies?
Do they charge for telephone or email inquiries?
How long is the waiting period to start your child’s program?
How far away do they live?
For out of the house therapies: Do they have any other clients in your area which you can What is their educational background?
How extensive is their experience in one-on-one sessions?
Ask for some references.