A Healthcare Proxy is a legal document that allows an individual, known as the principal, to appoint someone else, called the agent, to make medical decisions on their behalf if they become unable to do so. This arrangement ensures that the principal's healthcare preferences are respected, even when they cannot communicate them directly. The agent's responsibilities may include decisions about treatments, surgeries, and end-of-life care. It is important for the principal to discuss their wishes with the agent beforehand to ensure that their values and preferences are understood and honored in critical situations.