Hi jslim,
I think it depends on what the medical issue is. I had an 'issue' with my eyes and was class 4 at one point. However, the medical team at DFR was quite adamant that there was nothing wrong with my eyes, so they told me they will push for me go and do flight screening regardless. Although, I got a note from my GP to clear up the issue and AVMED put me back into class 1, and this happened before I went up for flight screening anyway. So it really depends how serious the issue is and what the medical team at DFR thinks (they were fighting really hard for my case against AVMED).
Good luck
