It sounds like there are more doctors moving from the US to Canada, but not a huge number. The numbers are up from last year, but not by a lot.
It would be interesting to know if Canadian healthcare workers are still moving to the US in a big way, but the article doesn’t explore that.
I can say that at least in the case of primary and specialty medical care, so long as you went to a licensed medical school, it doesn’t seem to be the case in Ontario or Nova Scotia.