Diagnostic assessment refers to a systematic evaluation process used to identify an individual's specific needs, challenges, and strengths, particularly in the context of mental health. This type of assessment is crucial for accurately diagnosing anxiety disorders as it helps clinicians gather comprehensive information about a person's symptoms, personal history, and the impact of those symptoms on daily life. By pinpointing the specific nature of the anxiety, diagnostic assessments guide treatment planning and ensure that individuals receive tailored interventions.