Literally, according to the diagnostic criteria as laid out in the DSM, there is no mental disorder unless there is a significant impairment of function. In other words, if you're not sure if there's something wrong with your kid, there's nothing wrong with your kid and you should not be seeking a diagnosis because there's nothing to diagnose. So no, unless there's a problem serious enough to medicate, you should not ask for a diagnosis. The medical system is not at fault if parents (or pushy teachers who have no business being involved in the first place) are too afraid that every little quirk might be "something wrong".
That's the dumbest thing I've seen in ages. Do you know what missed diagnosis, or late diagnosing costs, in societal costs at a later time, and human suffering?
Whatever happened to better safe than sorry?
But oh hey, I forgot, that's long term thinking, at that's forbidden in policy making.
Besides, how are laymen parents supposed to be
sure there's something wrong with their child or not? If they could accurately diagnose that, we'd need to diagnosticians at all.
DSM is such a silly, silly book. It's with good reason that those in the healthcare professional field who actually work with patients on a day to day basis hate it with a passion. I have yet to meet a social worker / elderly care nurse / field psychologist who does not want the DSM thrown down a paper shredder, because it's only purpose is to appease health insurance companies, and make it near impossible to approach a patient with a personalised and holistic viewpoint.
EDIT: maybe that's not completely fair. Maybe that's not the original intent with which the DSMs were compiled, but it's most certainly how they are being abused.
Treatments slightly outside the narrow box provided by the DSM simply won't be paid for.