Diagnosis of Depersonalization/Derealization Disorder
A doctor's evaluation
Sometimes tests to rule out other possible causes
Doctors suspect the disorder based on symptoms. A physical examination and sometimes tests are done to rule out other disorders that could cause the symptoms, including other mental health disorders, seizure disorders, and substance abuse. Tests may include magnetic resonance imaging (MRI), computed tomography (CT), electroencephalography (EEG), and urine tests to check for drugs.
Psychologic tests and special structured interviews and questionnaires can also help doctors with the diagnosis.