Psychological assessment services generally follow the same procedure with insurance as therapy services, but with a few extra components.
You'll still want to ask the questions about deductible, copay or co-insurance, and out-of-pocket maximum as you would for seeking therapy services. However, it's a good idea to also ask the following:
Do I need pre-authorization for an ADHD mental health evaluation?
If I need prior authorization, how do I obtain it?
What is my copay or co-insurance for the CPT codes 90791, 96132, 96133, 96136, and 96137? (It should be similar to that of other mental health services, but it can be helpful to check specifically the codes that will be billed.)
With this information, you can then use this Assessment Charge Calculator to estimate what you might expect to pay for all of the assessment-related services.
The exact balance will depend on what your insurance sets as their allowable amounts for any given service, the number of units (aka the amount of time) needed for your specific case, and if the obtained insurance information is accurate.