Diagnostic Test or Diagnostic Study Definition

A diagnostic procedure is an examination to identify an individual's specific areas of weakness and strength in order determine a condition, disease or illness. For example, in order to diagnose a herniated disc, physicians may employ Magnetic Resonance Imaging (MRI), Computer Assisted Tomography (CAT scan), and/or Electromyography (EMG) to determine if the herniated disc is impinging on a nerve root.