Which document expresses a person's end-of-life wishes for medical treatment?

The document that specifically expresses a person's end-of-life wishes for medical treatment is the living will. A living will is a legal document in which an individual lays out their preferences regarding medical treatment should they become unable to communicate their decisions themselves, particularly in situations such as terminal illness or irreversible condition.

The durable power of attorney, while important, designates someone to make healthcare decisions on behalf of the individual, but does not necessarily detail their specific medical treatment preferences.

The Patient Self-Determination Act (PSDA) is a law that ensures patients are informed of their rights regarding medical decision-making, including the right to create living wills and durable powers of attorney. However, it does not itself express individual treatment wishes.

An advance directive is a broader term that encompasses various documents, including both living wills and durable powers of attorney, which outline an individual's healthcare preferences. Therefore, the living will stands out as the specific document for articulating end-of-life medical treatment wishes.