What type of medical tests would be involved in checking my memory?

As I detailed in a previous post a few weeks back, I have been having issues with my memory for the last year or so. I forget important things and trivial things alike, seemingly at random. It has become a minor problem in my private and work life.

I am mildly concerned that it may be some kind of medical issue, like a tumor or some kind of condition or deficiency or what have you.

I am thinking of scheduling a check up as such. I kind of need one anyways, haven’t had one in 6+ years. What type of tests do you think a doctor would want to/need to run to ensure there wasn’t a larger medical issue behind my memory issues? (mostly I want to check my insurance and see how bad the copay would be, lol)