Psychiatry — Find Specialists & Top Hospitals Worldwide | MyMedicPlus

Psychiatry is the medical specialty focused on the diagnosis, treatment, and prevention of mental, emotional, and behavioural disorders. Psychiatrists are medical doctors (MD or DO) who specialise in mental health — a distinction that sets them apart from psychologists, counsellors, and therapists in that they can prescribe medications, order diagnostic tests, and manage the biological dimensions of mental illness, in addition to providing psychotherapy and psychosocial support.

Mental health conditions are among the most prevalent causes of disability globally. Depression affects more than 280 million people worldwide, and anxiety disorders affect an estimated 300 million. Schizophrenia, bipolar disorder, and other severe mental illnesses significantly impair functioning and quality of life for millions more. Psychiatry addresses these conditions through a biopsychosocial model — recognising that mental illness arises from a complex interplay of genetic vulnerability, neurobiological changes, psychological factors, and social determinants of health.

Psychiatry encompasses numerous subspecialties. Child and adolescent psychiatry addresses the unique mental health needs of young people, including ADHD, autism spectrum disorder, conduct disorder, and childhood depression. Geriatric psychiatry specialises in dementia-related behavioural symptoms, late-life depression, and age-related cognitive decline. Forensic psychiatry provides mental health assessment in legal contexts. Addiction psychiatry manages substance use disorders and co-occurring mental illness. Consultation-liaison psychiatry (CLP) provides psychiatric expertise in the general hospital setting for medically ill patients. Perinatal psychiatry addresses mental health conditions during pregnancy and the postpartum period.

Psychiatrists diagnose and manage the full spectrum of mental, emotional, and behavioural disorders as classified in the DSM-5-TR:

• Major depressive disorder (MDD): Persistent low mood, loss of interest or pleasure, sleep disturbance, and cognitive impairment, treated with antidepressants, psychotherapy, and neuromodulation.
• Bipolar disorder (types I and II): Cycling mood episodes alternating between depressive lows and manic or hypomanic highs, requiring mood stabilisers (lithium, valproate) and careful monitoring.
• Schizophrenia and schizoaffective disorder: Psychotic illnesses characterised by hallucinations, delusions, disorganised thinking, and negative symptoms, managed with antipsychotic medications and psychosocial rehabilitation.
• Generalised anxiety disorder (GAD): Chronic, excessive worry about multiple areas of life causing physical tension and functional impairment, treated with SSRIs, SNRIs, and cognitive behavioural therapy (CBT).
• Post-traumatic stress disorder (PTSD): Persistent re-experiencing, avoidance, negative cognitions, and hyperarousal following traumatic events, treated with trauma-focused psychotherapy and medications.
• Obsessive-compulsive disorder (OCD): Intrusive obsessive thoughts driving repetitive compulsive behaviours, treated with high-dose SSRIs and exposure and response prevention (ERP) therapy.
• Eating disorders: Including anorexia nervosa, bulimia nervosa, and binge eating disorder, requiring multidisciplinary treatment with nutritional rehabilitation, psychotherapy, and medical monitoring.
• Attention deficit hyperactivity disorder (ADHD) in adults: Inattention, impulsivity, and hyperactivity causing occupational and relationship impairment, managed with stimulant and non-stimulant medications and coaching.
• Personality disorders: Including borderline personality disorder (BPD), treated with dialectical behaviour therapy (DBT), and antisocial, narcissistic, and dependent personality disorders.
• Substance use disorders: Co-occurring addiction to alcohol, opioids, stimulants, or cannabis alongside psychiatric comorbidities, managed with medication-assisted treatment and integrated dual-diagnosis programmes.

Psychiatrists deliver a range of evidence-based biological, psychological, and social treatments:

• Psychopharmacology: Prescribing and titrating medications tailored to the patient's diagnosis, symptom profile, and prior treatment response — including antidepressants (SSRIs, SNRIs, TCAs, MAOIs), mood stabilisers (lithium, valproate, lamotrigine), antipsychotics (first- and second-generation), anxiolytics (buspirone, SSRIs), and stimulants for ADHD.
• Electroconvulsive therapy (ECT): Brief, controlled electrical stimulation of the brain under general anaesthesia, used for severe, treatment-resistant depression, acute mania, and catatonia. ECT is the most effective acute treatment for severe depression and carries a robust evidence base.
• Transcranial magnetic stimulation (TMS): Non-invasive repetitive magnetic stimulation of prefrontal cortex circuits in outpatient sessions over four to six weeks, FDA-cleared for treatment-resistant depression and OCD without the side effects of ECT.
• Ketamine and esketamine infusion therapy: Rapidly acting NMDA receptor antagonist producing antidepressant effects within hours, used for treatment-resistant depression and acute suicidal ideation. Esketamine (Spravato) nasal spray is FDA-approved.
• Psychiatric formulation and comprehensive assessment: Structured diagnostic interviews incorporating mental state examination, history of presenting illness, risk assessment, biopsychosocial formulation, and differential diagnosis.
• Risk assessment and crisis management: Structured assessment of suicide risk, self-harm, and risk to others, informing decisions about treatment intensity, safety planning, and inpatient admission.
• Medication-assisted treatment (MAT) for addiction: Prescribing buprenorphine, naltrexone, or methadone for opioid use disorder; acamprosate and naltrexone for alcohol use disorder, alongside psychosocial support.

A psychiatry referral is appropriate in a number of important clinical situations:

• Moderate to severe depression or anxiety: When symptoms have not responded adequately to at least one trial of first-line antidepressant medication at an adequate dose and duration (typically eight to twelve weeks), specialist psychiatric review is warranted.
• Bipolar disorder: Any patient with a history of manic episodes, elevated mood, grandiosity, reduced sleep, or rapid mood swings requires psychiatry evaluation — antidepressants alone can precipitate mania in bipolar disorder.
• Psychosis or suspected schizophrenia: New-onset hallucinations, delusions, disorganised speech, or grossly disorganised behaviour requires urgent psychiatric assessment — early intervention programmes have significantly improved long-term outcomes.
• Suicidal ideation with plan or intent: Active suicidal thoughts with a specific plan, access to means, or previous serious attempt require immediate psychiatric assessment, which may lead to crisis stabilisation or voluntary/involuntary inpatient admission.
• Eating disorders: Anorexia nervosa with BMI below 15, medical instability, or failure to progress in outpatient treatment requires referral to a specialist eating disorders programme.
• Complex medication management: Patients requiring clozapine, lithium, or MAOI therapy, or polypharmacy with multiple psychotropic medications, need ongoing psychiatric supervision given narrow therapeutic windows and monitoring requirements.
• Perinatal mental illness: Postpartum psychosis is a psychiatric emergency requiring inpatient care; antenatal and postnatal depression benefit from specialist perinatal psychiatry services.

Psychiatrists complete one of the broadest medical training programmes, spanning both biological medicine and the psychological and social sciences. In the United States, training begins with a four-year medical degree (MD or DO), followed by a four-year psychiatry residency accredited by the Accreditation Council for Graduate Medical Education (ACGME). Residency training provides rotations through inpatient adult psychiatry, emergency psychiatry and crisis services, outpatient psychiatry clinics, child and adolescent psychiatry, geriatric psychiatry, consultation-liaison psychiatry in the general hospital, and addiction psychiatry.

Following residency, subspecialty fellowships of one to two years are available in child and adolescent psychiatry, forensic psychiatry, addiction psychiatry, geriatric psychiatry, consultation-liaison psychiatry, sleep medicine, pain medicine, and psychosomatic medicine. These fellowships provide advanced training in specialised patient populations and treatment modalities.

Board certification is awarded by the American Board of Psychiatry and Neurology (ABPN) upon passing the general psychiatry certifying examination. Subspecialty board certifications are available in child and adolescent psychiatry, forensic psychiatry, addiction psychiatry, geriatric psychiatry, and consultation-liaison psychiatry. In the UK, psychiatrists hold MRCPsych (Member of the Royal College of Psychiatrists). Continuous professional development and periodic recertification maintain competency throughout practice.

Ask your GP for a psychiatry referral if you have persistent mental health symptoms that are interfering with work, relationships, or daily functioning, especially if initial treatments have not provided adequate relief. Many primary care practices now have embedded mental health clinicians who can provide initial assessment and manage straightforward conditions, with seamless referral to psychiatry for complex cases.

For acute psychiatric emergencies — including active suicidal ideation with a plan, severe psychosis, or acute mania — attend your nearest emergency department, call emergency services, or contact a crisis line. In the United States, dial 988 (Suicide and Crisis Lifeline) for immediate mental health crisis support 24 hours a day. Telehealth psychiatry has expanded significantly and is a convenient option for follow-up appointments and medication management for stable patients. When seeing a psychiatrist for the first time, bring a list of all current medications and supplements, any prior psychological testing reports, and a timeline of your symptoms and previous treatments.