Final answer:
A psychiatrist is a licensed physician who has completed residency or extensive training in a mental health setting. They can diagnose and treat mental disorders.
Step-by-step explanation:
A licensed physician who generally has completed a residencey or had extensive field placement training in a mental health setting is called a psychiatrist. Psychiatrists have a doctor of medicine degree (MD) and specialize in diagnosing and treating mental disorders. They can prescribe medications and provide therapy and counseling.