My experience with US ADHD medical providers is that they require an appointment every 3 months where you get another 3 scripts (with 2 being dated for the future months). One let me go a whole year without having an appointment but I also didn't ask for a script every month. Generics stimulants have been cheap with and without insurance (or with GoodRX).
After I moved and got a new GP and asked for a stimulant prescription, they wanted me to come in every single month and do a urine drug screen even if I provided info from my former providers. I switched to an ADHD specialist right after that. It's much more expensive but they treat me with respect.
Yeah I have to go in monthly to get mine as well. Thanks to college kid abuse and the opiate crisis doctors cover their ass when it comes to writing stimulant scripts. This means monthly visits (and they get $300 each time) and sometimes drug tests.
After I moved and got a new GP and asked for a stimulant prescription, they wanted me to come in every single month and do a urine drug screen even if I provided info from my former providers. I switched to an ADHD specialist right after that. It's much more expensive but they treat me with respect.