Definition
A psychiatrist is a physician (MD or DO) who has completed medical school followed by a four-year residency in psychiatry. The medical training is the defining feature of the role: a psychiatrist is licensed to take a full medical history, order and interpret laboratory and imaging studies, evaluate whether a presentation is being caused or worsened by a medical condition (such as thyroid disease, anemia, sleep apnea, or a neurological disorder), evaluate whether prescribed or over-the-counter medications and substances are contributing, diagnose mental health conditions, and prescribe and manage psychiatric medication. Some psychiatrists complete additional fellowship training in subspecialties such as child and adolescent psychiatry, addiction psychiatry, geriatric psychiatry, consultation-liaison psychiatry, or sports and performance psychiatry.
What it can feel like
Visits with a psychiatrist tend to focus on diagnosis, medication, and the medical picture, often in coordination with a separate therapist. The first visit is typically a longer evaluation. Follow-up visits are shorter and oriented around how treatment is going. Some psychiatrists also provide psychotherapy. The relationship is collaborative, and the plan should be explained rather than handed down.
Why it happens
The psychiatry residency includes general medical training plus specialized training in mental illness, psychopharmacology, and psychotherapy. That combination is what allows a psychiatrist to recognize when an anxious or depressed presentation is actually a thyroid problem, a medication interaction, or the effect of a substance, and to manage psychiatric medications with attention to other medical conditions and prescriptions.
When to see a clinician
A psychiatrist is the right referral when medication may be part of the treatment, when the diagnosis is unclear, or when previous treatment hasn't produced enough improvement. Continuity with the same psychiatrist over time is one of the strongest predictors of outcome.