20. Nephrology
Average annual wage: $306,302
Nephrology is a medical specialty in which doctors are specializing in kidney care; they diagnose, treat and cure kidney diseases. They are also dealing with people who have a problem with high blood pressure and some kind of metabolism disorder. If you have some kind of kidney problem you need to contact a nephrologist because if one disease isn’t cured on time it can become very dangerous and even fatal for a human life. Nephrologists need to have deep knowledge of medicine in order to provide their patients with the best medical treatment.

yezry/Shutterstock.com