What it is: grants your agent the authority to make decisions regarding your healthcare if you cannot — treatment choices, doctors’ decisions, and (in the Illinois form) end-of-life wishes.
In Illinois this pair (healthcare + property POA) is the core of a basic estate plan: naming people you trust to speak for you if you cannot speak for yourself. Written docs prevent family fights and court intervention at the worst possible moment.
What the Illinois form covers: it lets you choose your agent, alternate agents, and express wishes about life-sustaining treatment, artificial nutrition, and organ donation.
Watch out for: without a healthcare POA, a dispute among family about your care can end up in court with a guardian appointed. Naming one agent (with a clear alternate) avoids the “everyone wants to decide” standoff.