Your health care surrogate can make only choices about health care. For example, the choice to start, stop or try a different treatment, with your best interest in mind, of course. Most important, he or she can make decisions only if you can’t make them for yourself. Health care surrogates can also make sure that doctors follow your living will. In case you don’t have one, she or he tries to make the choices you make for yourself. the civil legal system.