Physician's Assistants in B Teams?

[0351nurse]

Hi everybody. This is my first post. I'm a former Marine grunt who EASed(got out) this past winter. I'm still considering my options for the future, but am deadset on something medical and currently in school. I always enjoyed being deployed and working with the ANA and IA when I was deployed to OEF and OIF. Because of that a couple of the paths I'm looking into are going back in and becoming a medic and trying for SF, or getting a reserve commission as a nurse or physician's assistant once I graduate.

At my current job I got to talking to a customer who saw the book I was reading and turns out he was SF and an airborne officer and said since I was in college I might want to look at becoming a physician's assistant in one of the SF company staffs or B teams(not sure which they're called).
Is this a for real billet? And if it is is it the sort of thing that would entail being in garrison until a major deployment, or would I actually get to deploy?