Tests and diagnosis

By Mayo Clinic Staff

Personality disorders, including borderline personality disorder, are diagnosed based on a:

  • Detailed interview with your doctor or mental health provider
  • Psychological evaluation that may include completing questionnaires
  • Medical history and exam
  • Review of your signs and symptoms

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), published by the American Psychiatric Association, is often used by mental health providers to diagnose mental health conditions and by insurance companies to reimburse for treatment.

A diagnosis of borderline personality disorder is usually made in adults, not in children or teenagers. That's because what appear to be signs and symptoms of borderline personality disorder may go away as children get older and become more mature.

July 30, 2015