But ohdearme would you have represented that information to a doctor in a completely different specialty as autism or "I think he has autism".
I have no truck with the latter I know several kids (both professionally and socially) who will probably have an ASDdiagnosis in the next few years and who we use autism behavioural techniques with. But their parents don't tell people they have a confirmed diagnosis of autism.
In actual fact the child I met at work didn't sound to me like his behaviour was typically ASD. It looked more like an ADHD/ODD but I did only see him for a short period but I assumed (might have been wrong) that his Mother knows he is a bit weird and Was using the current societally acceptable label to communicate his oddness to HCPs.
I know why parents do this but in pressurised hospital consultations it can mean kids acquire an incorrect label. It could actually stop them getting the correct diagnosis and treatment (say you came to see one of my gastro colleagues about feeding issues but told them a diagnosis of autism had been made, the Paeds gastro consultant wouldn't then suggest a referral for an autism/behavioural assessment as they would assume it had already been done when in fact it hadn't). Not seeing the correct team means your child doesn't get access to the albeit sometimes limited support available and sometimes parents do it deliberately to mislead professionals.
So in summary please share your kids oddities (especially with me as a Paeds anaesthetist - knowing they aren't NT helps me give them a better experience) but don't communicate that by using self applied label. If you are worried about Autism/ASD say that (or if small ears that you want to protect a bit are listening a social-communication disorder) but don't tell me they have a diagnosis when they don't.
Rant over.