Is a Psychiatrist an MD or DO? Here’s the Difference

Yes, a psychiatrist is a medical doctor. Every psychiatrist completes four years of medical school and earns either an MD (Doctor of Medicine) or a DO (Doctor of Osteopathic Medicine) degree before beginning specialized training in mental health. This medical foundation is what separates psychiatrists from other mental health professionals like psychologists or therapists, and it’s the reason psychiatrists can prescribe medication, order lab tests, and perform medical procedures.

Medical School Comes First

Psychiatrists follow the same path as any other physician. They start with four years of medical school, studying anatomy, biochemistry, physiology, and pharmacology alongside students who will become surgeons, cardiologists, or pediatricians. During those first two years, they also take courses in psychiatry, behavioral science, and neuroscience. In the final two years, they rotate through at least six different medical specialties, gaining hands-on experience treating patients with all kinds of conditions, not just mental health issues.

This broad medical training matters. It means a psychiatrist understands how thyroid problems can mimic depression, how liver function affects the way your body processes medication, or how a neurological condition might explain changes in behavior. That whole-body perspective is built into their education from day one.

MD vs. DO: No Practical Difference

Some psychiatrists hold an MD degree, others hold a DO. Both are fully licensed physicians with identical authority to practice medicine, prescribe drugs, and admit patients to hospitals. DO-trained psychiatrists can complete their residency at either allopathic (MD) or osteopathic programs, and the training criteria are equivalent. The American Board of Psychiatry and Neurology accepts both degrees for board certification. In practice, the distinction between the two letters has no effect on the care you receive.

Four Years of Residency After Medical School

Graduating from medical school is only the halfway point. New doctors who choose psychiatry then enter a four-year residency. The first year looks a lot like training for any other medical specialty: residents spend months in internal medicine, rotating through hospital wards and emergency departments, treating patients with heart disease, infections, diabetes, and other physical illnesses. This reinforces the point that psychiatrists are trained as general physicians before they specialize.

Starting in the second year, the focus shifts toward psychiatry. Residents rotate through inpatient psychiatric units, neurology, substance abuse treatment, consultation services for hospitalized patients with psychiatric needs, and child and adolescent clinics. By the third and fourth years, training centers on outpatient psychiatry, where residents manage their own panel of patients over months or years, learning the long-term care that defines much of the profession. Some residents also complete elective rotations in areas like forensic or geriatric psychiatry.

All told, a psychiatrist completes a minimum of 12 years of education and training after high school: four years of undergraduate study, four years of medical school, and four years of residency.

Board Certification Requirements

After residency, psychiatrists can pursue board certification through the American Board of Psychiatry and Neurology (ABPN). To qualify for the exam, a physician must hold a valid MD or DO degree from an accredited school, complete an accredited residency, and maintain an unrestricted medical license in at least one U.S. state or Canadian province. International medical graduates must meet additional credentialing requirements through the Educational Commission for Foreign Medical Graduates.

Board certification isn’t legally required to practice, but most hospitals and insurance networks expect it. It signals that a psychiatrist has met a national standard of competence beyond what licensure alone requires.

Subspecialties Add More Training

Some psychiatrists pursue even further specialization through fellowship programs after residency. Common subspecialties and their typical fellowship lengths include:

  • Child and adolescent psychiatry: 2 years
  • Addiction psychiatry: 1 year
  • Forensic psychiatry: 1 year
  • Geriatric psychiatry: 1 year
  • Psychosomatic medicine (psychiatric care for patients with complex medical illnesses): 1 year
  • Sleep medicine: 1 year
  • Hospice and palliative medicine: 1 year
  • Pain management: 1 year

A child and adolescent psychiatrist, for example, has completed at least 14 years of post-high school training before practicing independently.

What Psychiatrists Can Do That Psychologists Cannot

Because psychiatrists are medical doctors, they can prescribe medication, including powerful psychiatric drugs that affect the brain, nervous system, and other organ systems. The American Medical Association considers physician-level training essential for safe prescribing of these medications, noting that psychotropic drugs are among the most potent in modern medicine and can affect the entire body. Only six U.S. states currently allow psychologists (who hold doctoral degrees in psychology, not medical degrees) to prescribe psychiatric medication, and this remains controversial.

Psychiatrists can also order and interpret medical tests like bloodwork and brain imaging, perform physical examinations, and carry out specialized procedures. Electroconvulsive therapy (ECT), for instance, is used to treat severe depression, treatment-resistant depression, severe mania, and catatonia. Transcranial magnetic stimulation (TMS) is another brain stimulation procedure that psychiatrists administer. These are medical interventions that require a physician’s training and credentials.

Psychologists, by contrast, typically focus on talk therapy and psychological testing. Many patients benefit from seeing both: a psychiatrist for medication management and medical oversight, and a psychologist or therapist for ongoing therapy. In collaborative care models, psychiatrists also work alongside primary care doctors, providing diagnostic guidance and treatment recommendations for patients being seen in general medical settings.

Psychiatrist Compensation

The extensive training is reflected in earning potential. According to 2023 data from the U.S. Bureau of Labor Statistics, the median annual wage for psychiatrists is at or above $239,200. This places psychiatry among the higher-paying medical specialties, though it typically falls below surgical fields and some procedure-heavy specialties.