Yes -- except there is no such thing as a "mind doctor", at least in a scientific sense. Psychiatrists and psychologists cannot treat depression, and increasing amounts of neuroscientific evidence demonstrate that depression is not a mental illness, it's a physical one.

A recent study of deep brain stimulation (http://www.nytimes.com/2006/04/02/magazine/02depression.html...) is showing very promising preliminary results, results in which a patient's depression lifts instantly when the stimulating signal is applied, and resumes when the signal is removed. Apart from being a promising indication for future research, this study shows that depression is not a mental illness, the domain of psychiatry and psychology, it's a physical illness, the domain of neuroscience.