I think you would probably be better off rolling Healing & Medicine into one of the already existing chapters … either the general rules or perhaps combat since there aren’t a lot of times outside of results from combat that people tend to need to be healed.

I’m not sure if there would be a consensus out there, but it might be worthwhile to check what the major rpg systems out there decided in that regards. I think (although I don’t have the books handy to look at the moment while I’m at work) that d&d 3.5 put the basic healing concepts in the combat section of the Player’s Handbook.

At least it might indicate what sort of conventions new players might be expecting in that regards.

Mike