Hi Southie, I think you are focusing on the "level 4" distinction too much. It's just another medical facility with doctors. It just so happens that this facility has specialist doctors and equipment to treat the most intractable cases.

I'd expect your visit to be no different from any other medical facility with doctors. You will show up, wait a while, see a doctor, have tests done, wait some more, wait some more, wait some more, see the doctor again and get some feedback on the results and then make a plan on how to move forward with treatment.