Psychiatrists and nurse practitioners are both advanced practice clinicians who can diagnose and treat a wide range of mental health conditions. They may also provide therapy.
Both psychiatrists and nurse practitioners may prescribe medication. Their biggest differentiator is their depth of medical diagnostic training. Because of their medical school and residency background, psychiatrists are specifically trained to navigate complex differential diagnoses, identifying where physical health and mental health intersect — something vital for high-acuity patients.
Nurse practitioners, on the other hand, can prescribe medication in many states without a supervising physician. In some states, nurse practitioners can only prescribe with physician supervision — particularly when prescribing controlled substances, such as certain anti-anxiety medications.