Psychological Testing

First of all, have any of you had any of this done? What kind and were you satisfied with the results? Did you feel it was worth doing?

And now my personal question...

So I had psychological testing done over 3 years ago, going on 4. But in that time my diagnosis has changed significantly and I have been on over a dozen meds. My current therapist suggested that I write down a list of all the meds to give to my new med prescriber. I did, but sort of half carelessly left it in my pocket and my dad saw it. He was a little concerned about all the meds I have been on and thinks that I need a new evaluation to see what I actually need.

I just dont know if this makes sense. I do not think it is a bad idea myself, because I have had way too many diagnoses floated at me, especially recently by my new providers, and even more new meds suggested. But I just do not know how frequently its reasonable to get psychological tests done.

I looked online and I could not find much information about the frequency of having these tests done. Are they mostly a one time thing?

Anyways. For those who have had these tests done, how many times have you gone through the process?