There are certain pieces of basic information that must be provided for caregivers, whether using a sitter for the afternoon or enrolling your child at a weekday day care center. This goes double for a child with special needs.
While it's not necessary to divulge every detail of your child's history, you should make sure the provider has enough information on hand for their day-to-day care -- and in case of emergency.
Your phone number and a doctor's phone number are just the minimum. Refer to this sample checklist (mid-page) as a good starting point. Once created, keep the list saved on your computer where it's easy to update and print more as needed.