I live in the UK. I started reading more and more and suspecting I had ADHD but the wait list to get assessed is up to two years long on the NHS (our free health service). So I paid to go to a private psychiatrist who specialises in ADHD assessments for adults. Basically the options in this country are... go for the free health service (which is amazing and I'm not knocking our wonderful NHS workers but it's very neglected by the government at the moment and waiting times and services can be very slow)... Or pay a lot of money to go to a private company, but get seen to straight away and you don't need any kind of referral. And now I'm hoping I can take my diagnosis back to my regular NHS doctor and get treated.