Looking for (the best of course) developmental and behavioral pediatrician in phoenix area.?

Phoenix Children's . Although I do not work there I have a number of friends and colleagues at phoenix children's hospital. They do a fantastic job and are a referral site for kids from all over the country.
Ask your doctor. You are going to have your best luck by asking your pediatrician. They have the best working relationships with the specialists in your area. Alternatively, call the local pediatric hospital for their recomendations.
There are several. Two that come to mind are dr. Daniel b. Kessler & dr. Raun melmed. Check www.Sdbp.Org for a complete list.