M.T.
Hi Leona,
It really all depends - is your doctor a family practitioner, or a GP/internist who only sees adults? We do see a family practitioner, and started taking the kids there when their pediatric practice stopped taking our insurance. It is very handy to have all of us with the same doctor, and our doctor is very knowledgeable about the health issues I'm concerned with for my kids. They were maybe 6 and 10 when we started going to the family practice doctor.
GOOD LUCK