Honestly a pediatrician is a general medication type doc. They are trained to spot illnesses and treat things like colds and flu. Other stuff they usually refer to docs who's training is in that particular area.
Pediatricians are not experts and really should not treat anyone for a mental health issue. And ADHD is a neurological illness so a Psychiatrist should be the one prescribing all ADHD meds.
A pediatrician who does do extra training and gets a degree or some sort of specialized certificate can be good though. I would never trust one to treat our grandchild, I would always seek his ADHD care through a Psychiatrist who's job is entirely devoted to everything this illness is about.
It's sort of like this. Is an OB/GYN a full doc with all the same training as a doc who is a family doc? Yes, to a degree. The OB/GYN went further in their training and studied for years about the female organs, how the brain is different that men's brains, how the different organs produce needed elements to make women's issues more stable...they know the female business better than anyone else.
If you had a brain tumor that needed to be operated on would you go to your OB/GYN to plan him/her doing this brain surgery? Of course not. You would seek an appointment with a neuro surgeon that was skilled in that particular sort of tumor.
Or go to a pediatrician if you had a heart attack and needed to schedule open heart surgery.
A pediatrician is a kid doc for general purposes. If he didn't refer you to a psychiatrist for treatment for ADHD I would not use that doc at all.
I know there are pediatricians out there that do a find job treating thousands of kids but I still say that ADHD meds should be overseen by a psychiatrist at all times.