It will be challenging to get long term disability benefits for stress alone. In order to qualify for disability benefits, a doctor will have to determine you are unable to perform your job due to your illness. While it is not unheard of to be granted disability benefits for a mental condition, including depression or anxiety, it is much more common to be granted a leave of absence under these conditions. The main difference is that with a leave of absence, you are not given any compensation. If you feel your stress level is preventing you from doing your job, the only way to continue your pay is to get a doctor to certify this fact.