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Psychiatrist: a plain-language definition
A psychiatrist is a physician, an MD or DO, who completed residency training in psychiatry and can evaluate, diagnose, and prescribe. Board certification adds examination-verified expertise.
Medically reviewed by Shariq Refai, MD, MBA, FAPA, board certified psychiatrist · Last reviewed June 8, 2026 · Editorial policy
Definition
What psychiatrist means
A psychiatrist is a medical doctor who specializes in mental health. The path is long: four years of medical school to earn an MD or DO, then four years of psychiatry residency training in diagnosing and treating mental illness. Because a psychiatrist is a physician, they bring a full medical lens, able to recognize when a thyroid problem, a medication interaction, or another physical condition is contributing to psychiatric symptoms.
In practice psychiatrists evaluate, diagnose, and treat mental health conditions, and they can prescribe medication, which sets them apart from psychologists and most therapists. Many also provide or coordinate therapy. The medical training matters most in complex situations: someone on several medications, a person with co-occurring physical illness, or a diagnostic puzzle where the cause could be physical or psychiatric. Board certification, earned by passing the exams of the American Board of Psychiatry and Neurology, signals that this expertise has been independently verified.
This matters because the right level of care depends on the situation. For diagnosis, medication, and medically complex presentations, a psychiatrist's training is well suited. At shrinkMD, care is delivered by qualified clinicians through telepsychiatry to adults eighteen and older, currently in Maine and Nebraska with more states coming soon. The aim is the same as in any good psychiatric practice: an accurate diagnosis and a treatment plan grounded in evidence.
A common misconception is that psychiatrists only hand out medication and do not talk to patients. Good psychiatric care begins with a careful evaluation and an ongoing relationship, and many psychiatrists weave therapy into their work. Another misread is confusing psychiatrists with psychologists. Both are valuable, but a psychologist holds a doctorate in psychology and focuses on therapy and testing, while a psychiatrist is a physician who can prescribe.
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Frequently asked questions
Good questions, clear answers
What is the difference between a psychiatrist and a psychologist?
A psychiatrist is a medical doctor who can diagnose, prescribe medication, and treat the medical side of mental health. A psychologist holds a doctorate in psychology and focuses on therapy and psychological testing, without prescribing in most settings.
What does board certification mean for a psychiatrist?
It means the psychiatrist passed the examinations of the American Board of Psychiatry and Neurology, independently verifying their expertise beyond the basic requirements to practice.
Do psychiatrists only prescribe medication?
No. Good psychiatric care starts with a careful evaluation and an ongoing relationship. Many psychiatrists also provide therapy or coordinate it alongside medication.
Sources
Sources and further reading
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