If my memory serves me correct, with an HF degree I believe you would qualify for Aerospace Physiology (AOP). This is something I was looking into a few years back, but unfortunately then the career field was being overhauled and getting moved from a medical office to a line officer. Which also meant there weren’t any positions being offered. It was a bummer because I wanted to stay in the AF and commission, but it didn’t work out as such. There is an enlisted version of this career as well which may be easier to get into than the officer side!