I've had 2, one in-patient and one out patient. They are typically about 2-4 hours, they typically start with a general interview about how you have been feeling, and if you are married or have a partner they will likely want to interview them also. This is typically followed by a battery of tests, which will depend somewhat on your condition but can include trail marking, digit span, Wisconson card sort, and other tests designed to test memory, executive functions, or whatever you have had difficulty with. Then there will be a session to go over the test results and if any additional therapy or treatment is appropriate.

The first one I took showed how much work I had to do. The second one showed how far I had come