Verbatim response from Perplexity
An online ADHD assessment typically costs about $150 to $900 in the U.S., with many well-known services charging around $189–$199 for an initial assessment.[3][5][7][9][11] In the UK, private online ADHD assessments commonly start around £495–£695 and can rise to £1,200+ depending on the clinic and what’s included.[1][4][6][13]
A few concrete examples:
- ADHD Online / Mentavi: $189 one-time assessment.[5][7][11]
- Siya Health: $199 flat-rate adult evaluation.[9]
- Online ADHD Clinics UK: about £500–£1,200 for a comprehensive assessment with a report.[6]
- ADHD Centre UK: £695 for an online assessment that includes diagnosis and a written report.[4]
Price depends mainly on whether you’re getting a screening or a full diagnostic evaluation. Quick online screenings can be as low as $150–$300, while more comprehensive assessments with clinical interviews, questionnaires, and written reports are usually higher.[3][12][15][16] If you want, I can also compare the cheapest reputable options by country or insurance vs self-pay.