Anxiety disorders can be comorbid with all phobias, but specific phobias, as well as social phobias and agoraphobia, they are not anxiety disorders.
The reason is simple: anxiety disorders are primary anxiety symptoms with no clear object or fixed content; whereas specific phobias, social and place phobias these are conditioned anxiety fears that have predisposing causes. These are two very different situations.
In terms of treatment, all types of phobias can be treated with systematic desensitization training for their respective triggers, so psychotherapy, especially cognitive-behavioral therapy, can achieve very good results. But not for anxiety disorders, where desensitization to the ever-changing triggers of anxiety can be a waste of effort.
In CCMD-3, social phobia, agoraphobia, and specific phobia, all fall under the category of phobias (phobias), which are juxtaposed with anxiety disorders and obsessive-compulsive disorder, and belong to the same neurological disorder. Only two types are included under anxiety disorders: generalized anxiety disorder and panic disorder.