A medical directive, commonly called an advance directive, is a legal document that spells out your wishes for medical care in situations where you can’t speak for yourself. These documents only take effect if you become unable to communicate, whether from a serious illness, an injury, or a medical emergency. About one in three U.S. adults has completed some form of advance directive, which means roughly two-thirds of the population has no formal plan in place.
The Two Main Types
Advance directives come in two primary forms, and they serve different purposes. Most people benefit from having both.
A living will is a written document that details the specific medical treatments you do and don’t want used to keep you alive. It covers decisions like whether you’d want to be placed on a ventilator, receive CPR, be given artificial nutrition through a feeding tube, or undergo dialysis. It can also address preferences around pain management and organ donation. The living will speaks for you when you physically cannot.
A healthcare power of attorney (sometimes called a healthcare proxy or durable power of attorney for healthcare) names a specific person to make medical decisions on your behalf. This is different from a living will because instead of listing treatment preferences in advance, you’re trusting someone to interpret situations as they come up and decide what you’d want. The person you choose doesn’t need to be a lawyer or medical professional. They need to understand your values and be willing to advocate for them under pressure.
A living will can’t anticipate every possible medical scenario. A healthcare proxy can adapt in real time but might face decisions they feel uncertain about. Having both documents gives your medical team the clearest picture of what you want.
What a Living Will Typically Covers
Living wills address the treatments most likely to come up in a life-threatening situation. These generally include CPR if your heart stops, mechanical ventilation if you can’t breathe on your own, tube feeding or IV nutrition if you can’t eat, dialysis if your kidneys fail, and antibiotics for serious infections. You can specify which of these you’d accept and which you’d refuse.
Beyond emergency interventions, a living will can include your preferences for comfort care (ensuring you’re kept free of pain even if curative treatment stops), whether you’d want to donate organs or tissue, and sometimes your wishes about where you’d prefer to receive care in your final days. The specifics you can include vary somewhat by state, but the core purpose is the same everywhere: giving doctors clear guidance when you can’t provide it yourself.
How Directives Differ From Medical Orders
An advance directive is a document you create. A Portable Order for Life-Sustaining Treatment, known as POLST (or MOLST in some states), is an actual medical order signed by both you and a healthcare provider. POLST forms are designed to travel with you across healthcare settings, from hospitals to nursing facilities to ambulances, and they’re immediately actionable by emergency responders in a way that a standard advance directive sometimes isn’t.
POLST forms contain specific sections covering CPR, the level of medical intervention you want, antibiotics, and artificial nutrition. Emergency medical personnel are generally required to begin resuscitation unless they can see a state-approved order like a POLST saying otherwise. A living will alone, without a corresponding medical order, can sometimes create confusion in fast-moving emergencies. One national study found that physicians misinterpreted an advance directive as an automatic do-not-resuscitate order 78% of the time, regardless of what the directive actually said. Pairing your advance directive with a POLST, if your state offers one, reduces that risk.
Legal Requirements to Make One Valid
Every state recognizes advance directives, but the rules for creating a valid one vary. Most states require you to sign and date the document while you still have the mental capacity to make your own decisions. Some states require witnesses, others recommend but don’t require them, and a few require notarization. New Mexico, for example, recommends two witnesses but doesn’t mandate them.
You don’t need a lawyer to create an advance directive, though consulting one can help if your situation is complex. Many hospitals, state health departments, and nonprofit organizations provide free forms specific to your state. The important thing is using a form that meets your state’s legal standards.
Portability Across State Lines
There is no unified national system for recognizing advance directives across states. Many states will honor a directive created in another state, but some may question its validity if the document doesn’t meet local requirements. The laws, required language, and formalities vary widely. Colorado, for instance, presumes that a directive from another state complies with its own laws and allows healthcare providers to rely on it in good faith. Not every state is that accommodating.
If you split time between two states or plan to relocate, consider completing a directive that’s valid in each state where you spend significant time. At minimum, carry a copy of your directive when you travel so it’s accessible if something happens away from home.
Changing or Revoking a Directive
You can change or cancel your advance directive at any time, as long as you still have the mental capacity to make decisions. This is true even if you’re in a hospital. If you’re able to communicate, your current spoken wishes generally take priority over a previously written directive. Medical teams are expected to verify existing directives and confirm they still reflect what you want before following them.
It’s worth revisiting your directive after major life changes: a new diagnosis, a marriage or divorce, the death of your named healthcare proxy, or simply a shift in how you think about end-of-life care. When you update your directive, make sure the new version reaches your healthcare proxy, your doctor’s office, and any hospital where you’ve been treated. Old copies floating around in medical records can create exactly the kind of confusion these documents are meant to prevent.
What Happens Without One
If you arrive at an emergency department unable to communicate and no directive exists, doctors will generally default to providing all life-sustaining interventions. The reasoning is straightforward: treatments can be withdrawn later, but the window to save a life may close in minutes. From there, the medical team will try to locate family members and piece together what you might want through bedside conversations. This process can be slow, emotionally charged, and sometimes leads to disagreements among family members about the right course of action.
Having a directive on file removes that guesswork. It gives your family clarity during what is already one of the hardest moments they’ll face, and it gives your medical team the legal backing to follow your wishes rather than defaulting to interventions you may not have wanted.