There are rare exceptions to this this policy but, of course, in those cases such younger patients will need to be accompanied by a parent or guardian.
There are several reasons for this policy which I would like to explain below.
Now, before you think me irresponsible let me add the following. If you have a child who is overweight, by all means, consult with his or her pediatrician but if, after a careful medical and endocrine (hormone) evaluation, the pediatrician can find nothing specific that is wrong, you may be better served by turning inward, improving your own lifestyle, eating better and exercising. More than any lecture or weight loss program helps, you may come to find that taking care of yourself and setting a great example helps your child too.
If you are a parent reading this, I hope that you take my words to heart. It would be easy for me take your money and do nothing helpful for your child, or even worse, exacerbate the problem. Except I can't do that and I won't. I am however happy to talk to you about these matters if you believe that I can be of service. Feel free to email me.