There are regulatory bodies for health care professionals. I'm probably best positioned to speak to that which is in place for physicians because that's the one that I'm most familiar with.
There's a training process for physicians to go through in order to acquire their medical licence to practice. Through the various provinces' colleges of physicians and surgeons, there are ongoing expectations that you are meant to uphold in the practice of medicine. As well, for those of us who are specialist physicians, we have obligations to our college, the Royal College of Physicians and Surgeons of Canada. In the case of family medicine practitioners, it's The College of Family Physicians of Canada.