Is this mental illness considered a disability?
Yes, it is an illness that can be a disability. Therefore in the US, you are protected at work under the American Disabilities Act. Your workplace has to make accomodations for you, such as allowing for doctors appointments, etc. (If you tell HR) Additionally, Yes, you could get disability benefits if it affects your life. For example, if you are incapable of keeping a job or if you are in and out of mental hospitals, then it would qualify you for disability benefits. Getting disability benefits is not easy. You have to be able to show that your illness affects your functioning. So, they usually look at your medications, your therapy, your hospitalizations, etc.