Could be! Actually, would (or could) a Swedish doctor use "we" in that way? It's a bit old-fashioned in Britain, but still sometimes heard. Or you might bump into an old friend and he could say "We have gained weight, haven't we?", meaning you. Wikipedia calls it "the patronizing we" https://en.wikipedia.org/wiki/We#The_patronizing_.22we.22
It's old-fashioned in Swedish as well, mostly because it was a way to avoid having to use titles a long time ago, and it has since fallen out of fashion. Frankly, a lot of people would feel very belittled if their doctor talked that way. And doctor being a high-status trade, I can see some doctors behaving that way. But it would definitely not be the norm.
Edit: And I wrote the above before even noticing the "patronizing we". Very suiting term. :)