A "health care proxy," sometimes called a "health care surrogate" or "durable medical power of attorney," is the appointment of a person to whom you grant authority to make medical decisions in the event you are unable to express your preferences. Most commonly, this situation occurs either because you are unconscious or because your mental state is such that you do not have the legal capacity to make your own decisions. Normally, a single individual is appointed as your health care proxy, though quite commonly one or more alternate persons are designated in the event your first choice proxy is unavailable. As with the living will, medical professionals will make the initial determination as to whether or not you have the capacity to make your own medical treatment decisions. The health care proxy is a durable power of attorney specifically designed to cover medical treatment. As with living wills, depending on your state of residence, it may be a state-determined form or may be drafted individually by your attorney.