Hopeful1,
Sorry to hear about your dad's situation.
First, he's already been diagnosed with high grade bladder cancer. You do not want to try to randomly figuring out if a urologist is the right one or not.
He needs to get to a top bladdder cancer doctor at a major bladder cancer center. He needs a TURBT with full margins and the pathology report to be read at a top bladder cancer hospital. Yes, even the pathology doctors are better at the top hospital.
Other than making sure they are not bladder cancer, I wouldn't worry so much about the other things found. Cancer wins when it comes to prioritization.
A TURBT is the next step that he needs to get staging. There is typically another one done within six weeks of the first. You mentioned that you were in the medical field. That's good because you will already understand the difference in levels of specialty.
As you know, a urologist covers all urological diseases and conditions, the same way a general physician covers the whole body. Once you know you have bladder cancer, you get a referral to a top urological bladder cancer specialist. They are better at doing TURBTs and tend to get good margins the first time.
They also are better at determining the treatment option with the best outcomes.
Let us know where your father lives so we can recommend a top doctor/hospital in his area.
I am not a doctor but I am a patient with a good bit of experience who has done a lot of research. In the meantime, I suggest reading this post I wrote previously:
Major Bladder Cancer Hospital
Within that post is a link to a guide I put together to help bladder cancer patients understand the path(s) through this. Here is that link:
Patient Guide to Bladder Cancer Treatment
Read these as they may help you.
Mike