A healthcare proxy is a legal document that allows an individual, known as the principal, to appoint someone else, called a healthcare agent, to make medical decisions on their behalf if they become unable to do so. This arrangement ensures that a trusted person can advocate for the principal's wishes regarding medical treatment and care. The healthcare agent's authority typically includes decisions about surgeries, medications, and end-of-life care. It is important for the principal to discuss their values and preferences with the healthcare agent to ensure that their wishes are honored. This document is often part of broader advance care planning, which may also include a living will.