If you should choose to go alone, be sure that the driver is not a requirement of the hospital. I have had what I considered to be less than dramatic tests/interventions where the treatment center REQUIRES that someone else drive, and that person has to check in with you before they allow the work. I had one case where I had to call a taxi, but the clinic did not allow taxis. Since the driver (my regular guy) had been involved with these folks before and warned me, we just went in my car.
In some cases it is an insurance issue for all concerned, even if you feel like driving.
My biopsy / surgery was at 56, due to a higher than acceptable PSA, but no other issues. Welcome to the club!