Sometimes you should just let them do their job and NOT 'ask' for anything in particular...especially for the initial meeting. For the first visit, just focus on going over your symptoms (in priority order from most intolerable to least) in detail. Take a list to make sure you cover everything you want to (very easy to forget things in the moment if you know what I mean).

But even if you don't 'ask', make sure you cover the areas that you want to discuss...like lip biopsy, steroids trial to determine inflammatory, other AI testing, MCAS, etc. Find out his position on treatment options for AI related PN...like IVIG, steroids, DMARDS, etc.

You are well versed in your own body and many of the possible causes of PN, so just tell him about bothers you most and what you hope to achieve from his help. I have no doubts that you'll do just fine and hopefully you'll have an attentive doctor.