You're over thinking this. Neither health insurance companies nor any employer that isn't a complete pile of shit cares if you have ADHD. The only time an employer has even had an official record that I have it is when they have mandatory drug testing and mine comes back positive for amphetamines. If they ask about it at all, usually "I take Vyvanse for ADHD" ends the conversation and it never comes up again.
Do what's best for your health and well being.