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STEWARD BRIEF

What Does an Advance Directive Do?

Advance directives are about medical decisions during life, not about who inherits property after death.

Research checked
October 8, 2026
Jurisdiction
United States; advance-directive terminology and execution rules vary by state
Sources reviewed
3
General education, not legal advice
ABSTRACT

An advance directive is a legal document used to communicate medical-care instructions for a time when a person cannot communicate their own wishes. The National Institute on Aging identifies two common forms: a living will and a durable power of attorney for health care. A living will records treatment preferences. A health-care power names a proxy or agent who can make medical decisions if the person cannot do so. Some states combine these functions in one form and others separate them. Advance directives may address life-sustaining treatment, resuscitation, artificial nutrition and hydration, organ donation, or other issues depending on state law and the document. They are distinct from a Last Will and from a financial power of attorney.

Question presented

What does an advance directive do, and how does it fit into an estate plan?

Summary of findings

An advance directive addresses future health-care decisions if the person cannot communicate. It can record treatment preferences, name a health-care decision-maker, or do both depending on the state form.

Analysis

Living will

The National Institute on Aging describes a living will as a legal document that tells doctors how a person wants to be treated if they cannot make their own decisions about emergency treatment. It can express preferences about treatments that may be used to sustain life.

Health-care proxy or agent

A durable power of attorney for health care names a person to make health-care decisions if the principal cannot communicate. The proxy’s authority and duties depend on the document and state law.

Instructions and a decision-maker solve different problems

A written treatment preference can address circumstances the document anticipates. A proxy can respond to circumstances that were not predicted. Many advance-care systems therefore use both written instructions and an appointed decision-maker.

Advance directives are not Last Wills

A Last Will generally concerns estate administration and property after death. An advance directive concerns health-care decisions while the person is alive but unable to communicate. The similarity in the phrase “living will” can obscure that distinction.

Sharing the document matters operationally

The National Institute on Aging recommends giving copies of advance directives to the health-care proxy and health-care provider. A document that cannot be located when a medical decision must be made may be harder to use in practice.

Where the answer varies

States differ in terminology, statutory forms, witness or notarization requirements, who may serve as an agent, when the directive becomes operative, and the treatment choices that can be expressed.

Steward context

Steward includes state-specific advance-care documents in its foundational estate-planning process because medical decision-making is separate from inheritance planning. If you have questions about how an advance directive applies to a specific medical or legal circumstance, you should consult an appropriate health-care professional and, when individualized legal judgment is needed, a licensed attorney in your state.