Introduction
The following disorders are contained in this section: Panic Disorder Without Agoraphobia, Panic Disorder With Agoraphobia, Agoraphobia Without History of Panic Disorder, Specific Phobia, Social Phobia, Obsessive -Compulsive Disorder, Posttraumatic Stress Disorder, Acute Stress Disorder, Generalized Anxiety Disorder, Anxiety Disorder Due to a General Medical Condition, Substance-Induced Anxiety Disorder, and Anxiety Disorder Not Otherwise Specified. Because Panic Attacks and Agoraphobia occur in the context of several of these disorders, criteria sets for a Panic Attack and for Agoraphobia are listed separately at the beginning of this section.

A Panic Attack is a discrete period in which there is the sudden onset of intense apprehension, fearfulness, or terror, often associated with feelings of impending doom. During these attacks, symptoms such as shortness of breath, palpitations, chest pain or discomfort, choking or smothering sensations, and fear of “going crazy” or losing control are present.

Agoraphobia is anxiety about, or avoidance of, places or situations from which escape might be difficult (or embarrassing) or in which help may not be available in the event of having a Panic Attack or panic-like symptoms.

Panic Disorder Without Agoraphobia is characterized by recurrent unexpected Panic Attacks about which there is persistent concern. Panic Disorder With Agoraphobia is characterized by both recurrent unexpected Panic Attacks and Agoraphobia.

Agoraphobia Without History of Panic Disorder is characterized by the presence of Agoraphobia and panic-like symptoms without a history of unexpected Panic Attacks.

Specific Phobia is characterized by clinically significant anxiety provoked by exposure to a specific feared object or situation, often leading to avoidance behavior.

Social Phobia is characterized by clinically significant anxiety provoked by exposure to certain types of social or performance situations, often leading to avoidance behavior.

Obsessive-Compulsive Disorder is characterized by obsessions (which cause marked anxiety or distress) and/or by compulsions (which serve to neutralize anxiety).

Posttraumatic Stress Disorder is characterized by the reexperiencing of an extremely traumatic event accompanied by symptoms of increased arousal and by avoidance of stimuli associated with the trauma.

Acute Stress Disorder is characterized by symptoms similar to those of Posttraumatic Stress Disorder that occur immediately in the aftermath of an extremely traumatic event.

Generalized Anxiety Disorder is characterized by at least 6 months of persistent and excessive anxiety and worry.

Anxiety Disorder Due to a General Medical Condition is characterized by prominent symptoms of anxiety that are judged to be a direct physiological consequence of a general medical condition.

Substance-Induced Anxiety Disorder is characterized by prominent symptoms of anxiety that are judged to be a direct physiological consequence of a drug of abuse, a medication, or toxin exposure.

Anxiety Disorder Not Otherwise Specified is included for coding disorders with prominent anxiety or phobic avoidance that do not meet criteria for any of the specific Anxiety Disorders defined in this section (or anxiety symptoms about which there is inadequate or contradictory information).

Because Separation Anxiety Disorder (characterized by anxiety related to separation from parental figures) usually develops in childhood, it is included in the “Disorders Usually First Diagnosed in Infancy, Childhood, or Adolescence” section. Phobic avoidance that is limited to genital sexual contact with a sexual partner is classified as Sexual Aversion Disorder and is included in the “Sexual and Gender Identity Disorders” section.