Diagnosis

Some features of narcissistic personality disorder are similar to those of other personality disorders. Also, it's possible to be diagnosed with more than one personality disorder at the same time. This can make diagnosis of narcissistic personality disorder more challenging.

Diagnosis of narcissistic personality disorder typically is based on:

• Signs and symptoms
• A physical exam to make sure you don't have a physical problem causing your symptoms
• A thorough psychological evaluation that may include filling out questionnaires
• Criteria in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), published by the American Psychiatric Association