Thanks for the reply.  My view is that the nav bar is for the medical profession.  There's also a medicine portal.  There's a health portal that includes nursing and I started working on a nursing portal last week.  No need to blur the lines between the professions.  Traditionally medicine has dominated the health care field but in numbers there are a lot more nurses, not to mention other professionals and paraprofessionals.
I suppose you could do a separate nav bar for all the health professions together giving each of them equal weight but I don't see a purpose in that as there is already a category for it. -