Yes, you can get an ESA letter approval if you have an anxiety disorder. Emotional support animals can also be helpful in the case of depression, specific phobias, PTSD, and chronic stress, among others. People with these conditions may find significant relief through the companionship of ESAs. To obtain an ESA letter for anxiety or another disorder, you will need to consult with a qualified healthcare professional who can assess your condition and determine if an emotional support animal would be beneficial for you.